Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()
	n := io.NextInt()
	for i := 0; i < n; i++ {
		s, t := io.NextLine(), io.NextLine()
		io.Println(f(s, t))
	}
}

func f(s, t string) string {
	for i := len(s) - 1; i >= 0; i-- {
		switch s[i] {
		case 'C':
			t = strings.Join([]string{t[1:], string(t[0])}, "")
		case 'J':
			t = strings.Join([]string{string(t[len(t)-1]), t[:len(t)-1]}, "")
		case 'E':
			if len(t)%2 == 1 {
				t = strings.Join([]string{t[len(t)/2+1:], string(t[len(t)/2]), t[:len(t)/2]}, "")
			} else {
				t = strings.Join([]string{t[len(t)/2:], t[:len(t)/2]}, "")
			}
		case 'A':
			r := []rune(t)
			for i, n := 0, len(r); i < n/2; i++ {
				r[i], r[n-i-1] = r[n-i-1], r[i]
			}
			t = string(r)
		case 'M':
			r := []rune(t)
			for i := 0; i < len(r); i++ {
				if '0' <= r[i] && r[i] < '9' {
					r[i]++
				} else if r[i] == '9' {
					r[i] = '0'
				}
			}
			t = string(r)
		case 'P':
			r := []rune(t)
			for i := 0; i < len(r); i++ {
				if '0' < r[i] && r[i] <= '9' {
					r[i]--
				} else if r[i] == '0' {
					r[i] = '9'
				}
			}
			t = string(r)
		}
	}
	return t
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := make([]interface{}, 0, len(a))
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := make([]interface{}, 0, len(a))
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

C++: #include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstdlib>

using namespace std;

string Mr_J(string s){
  string a;
  a.clear();
  a+=s[s.length()-1];
  a+=s.substr(0,s.length()-1);
  
  return a;
}

string Mr_C(string s){
  string a;
  a.clear();

  a+=s.substr(1,s.length());
  a+=s[0];
  return a;
}

string Mr_E(string s){
  string a;
  a.clear();
  if(s.length()%2 == 0){
    a+=s.substr(s.length()/2,s.length()/2);
    a+=s.substr(0,s.length()/2);
  }
  else{
    a+=s.substr(s.length()/2+1,s.length()/2);
    a+=s.substr(s.length()/2,1);
    a+=s.substr(0,s.length()/2);
  }
  return a;
}

string Mr_A(string s){
  
  reverse(s.begin(),s.end());
  
  return s;
}

string Mr_M(string s){
  string a;
  a.clear();
  for(int i=0;i<s.length();i++){
    if('0'<= s[i] && s[i] <='9'){
      if(s[i] == '9')a+='0';
      else a+=(char)(s[i]+1);
    }
    else a+=s[i];
  }

  return a;
}

string Mr_P(string s){
  string a;
  a.clear();
  for(int i=0;i<s.length();i++){
    if('0'<= s[i] && s[i] <= '9'){
      if(s[i] == '0')a+='9';
      else a+=(char)(s[i]-1);
    }
    else a+=s[i];
  }
  return a;
}


int main(){
  int n;
  string operation,message;
  
  cin >> n;
  while(n-- > 0){
    cin >> operation >> message;
    for(int i=operation.length()-1;i>=0;i--){
      if(operation[i] == 'A'){
	message = Mr_A(message);
	//cout << "A = " << message << endl;
      }
      else if(operation[i] == 'J'){
	message = Mr_J(message);
	//cout << "J = " << message << endl; 
      }
      else if(operation[i] == 'C'){
	message = Mr_C(message);
	//cout << "C = " << message << endl;
      }
      else if(operation[i] == 'E'){
	message = Mr_E(message);
	//cout << "E = " << message << endl;
      }
      else if(operation[i] == 'P'){
	message = Mr_P(message);
	//cout << "P = " << message << endl;
      }
      else if(operation[i] == 'M'){
	message = Mr_M(message);
	//cout << "M = " << message << endl;
      }

    }
    cout << message << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<cctype>

#define all(c) (c).begin(),(c).end()

using namespace std;

void J(string &s){
  string a="";
  a+=s.substr(1,s.size()-1);
  a+=s[0];
  s=a;
}

void C(string &s){
  string a="";
  a+=s[s.size()-1];
  a+=s.substr(0,s.size()-1);
  s=a;
}

void E(string &s){
  string a="";
  if(s.size()%2==1){
    a+=s.substr(s.size()/2+1,s.size()/2);
    a+=s[s.size()/2];
    a+=s.substr(0,s.size()/2);
  }
  else {
    a+=s.substr(s.size()/2,s.size()/2);
    a+=s.substr(0,s.size()/2);
  }
  s=a;
}

void A(string &s){
  reverse(all(s));
}

void P(string &s){
  for(int i=0;i<s.size();i++){
    if(s[i]=='9')s[i]='0';
    else if(isdigit(s[i]))s[i]++;
  }
}

void M(string &s){
  for(int i=0;i<s.size();i++){
    if(s[i]=='0')s[i]='9';
    else if(isdigit(s[i]))s[i]--;
  }
}

int main(void){
  int n;
  string s,com;
  cin >> n;
  while(n--){
    cin >> com >> s;
    A(com);
    for(int i=0;i<com.size();i++){
      if(com[i]=='J')C(s);
      else if(com[i]=='C')J(s);
      else if(com[i]=='E')E(s);
      else if(com[i]=='A')A(s);
      else if(com[i]=='P')M(s);
      else P(s);
    }
    cout << s << endl;
  }
  
  
  return 0;
}

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

bool solve(){
    string s, t;
    cin >> s >> t;
    reverse(s.begin(), s.end());
    for(auto c : s){
        if(c == 'J'){
            t.insert(t.begin(), t.back());
            t.pop_back();
        }
        if(c == 'C'){
            t.push_back(t.front());
            t.erase(t.begin());
        }
        if(c == 'E'){
            string tmp;
            tmp.insert(tmp.end(),t.begin()+(t.size()+1)/2,t.end());
            if(int(t.size())%2) tmp.push_back(t[t.size()/2]);
            tmp.insert(tmp.end(),t.begin(), t.begin()+t.size()/2);
            t = tmp;
        }
        if(c == 'A'){
            reverse(t.begin(), t.end());
        }
        if(c == 'P'){
            for(auto& d : t){
                if(d >= '0' && d <= '9') d = (d-'0'+9)%10+'0';
            }
        }
        if(c == 'M'){
            for(auto& d : t){
                if(d >= '0' && d <= '9') d = (d-'0'+1)%10+'0';
            }
        }
    }
    cout << t << endl;
    return true;
}

int main(){
    int t; cin >> t; for(;t>0;t--) solve();
    return 0;
}