Language: C++

#include<bits/stdc++.h>
using namespace std;


int main(){
  cin>> pop;
  if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
    cout<< "A" <<endl;
  }
  if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
    cout<<"a"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'pop' was not declared in this scope; did you mean 'pow'?
    6 |   cin>> pop;
      |         ^~~
      |         pow
a.cc:7:14: error: 'Q' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |              ^
a.cc:7:17: error: 'W' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                 ^
a.cc:7:20: error: 'E' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                    ^
a.cc:7:23: error: 'R' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                       ^
a.cc:7:26: error: 'T' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                          ^
a.cc:7:29: error: 'Y' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                             ^
a.cc:7:32: error: 'U' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                ^
a.cc:7:35: error: 'I' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                   ^
a.cc:7:38: error: 'O' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                      ^
a.cc:7:41: error: 'P' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                         ^
a.cc:7:44: error: 'A' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                            ^
a.cc:7:47: error: 'S' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                               ^
a.cc:7:50: error: 'D' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                  ^
a.cc:7:53: error: 'F' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                     ^
a.cc:7:56: error: 'G' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                        ^
a.cc:7:59: error: 'H' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                           ^
a.cc:7:62: error: 'J' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                              ^
a.cc:7:65: error: 'K' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                 ^
a.cc:7:68: error: 'L' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                    ^
a.cc:7:71: error: 'Z' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                       ^
a.cc:7:74: error: 'X' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                          ^
a.cc:7:77: error: 'C' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                             ^
a.cc:7:80: error: 'V' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                                ^
a.cc:7:83: error: 'B' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                                   ^
a.cc:7:86: error: 'N' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                                      ^
a.cc:7:89: error: 'M' was not declared in this scope
    7 |   if( pop == Q||W||E||R||T||Y||U||I||O||P||A||S||D||F||G||H||J||K||L||Z||X||C||V||B||N||M){
      |                                                                                         ^
a.cc:10:13: error: 'q' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |             ^
a.cc:10:16: error: 'w' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                ^
a.cc:10:19: error: 'e' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                   ^
a.cc:10:22: error: 'r' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                      ^
a.cc:10:25: error: 't' was not declared in this scope; did you mean 'tm'?
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                         ^
      |                         tm
a.cc:10:28: error: 'y' was not declared in this scope; did you mean 'yn'?
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                            ^
      |                            yn
a.cc:10:31: error: 'u' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                               ^
a.cc:10:34: error: 'i' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                  ^
a.cc:10:37: error: 'o' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                     ^
a.cc:10:40: error: 'p' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                        ^
a.cc:10:43: error: 'a' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                           ^
a.cc:10:46: error: 's' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                              ^
a.cc:10:49: error: 'd' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                 ^
a.cc:10:52: error: 'f' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                    ^
a.cc:10:55: error: 'g' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                       ^
a.cc:10:58: error: 'h' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                          ^
a.cc:10:61: error: 'j' was not declared in this scope; did you mean 'jn'?
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                             ^
      |                                                             jn
a.cc:10:64: error: 'k' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                                ^
a.cc:10:67: error: 'l' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                                   ^
a.cc:10:70: error: 'z' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                                      ^
a.cc:10:73: error: 'x' was not declared in this scope
   10 |   if(pop == q||w||e||r||t||y||u||i||o||p||a||s||d||f||g||h||j||k||l||z||x||c||v||b||n||m){
      |                                                                         ^
a.cc:10:76: e