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 <string>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <functional>
#include <bitset>
#include <assert.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef pair<ll,ll> P;
typedef vector<P> vpl;
typedef tuple<ll,ll,ll> tapu;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define REP(i,a,b) for(int i=(a); i<(b); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int inf = 1<<30;
const ll linf = 1LL<<62;
const int MAX = 510000;
ll dy[8] = {0,1,0,-1,1,-1,1,-1};
ll dx[8] = {1,0,-1,0,1,-1,-1,1};
const double pi = acos(-1);
const double eps = 1e-7;
template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){
	if(a>b){
		a = b; return true;
	}
	else return false;
}
template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){
	if(a<b){
		a = b; return true;
	}
	else return false;
}
template<typename T1,typename T2> inline void print2(T1 a, T2 b){cout << a << " " << b << "\n";}
template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){
	cout << a << " " << b << " " << c << "\n";
}
const int mod = 1e9 + 7;
//const int mod = 998244353;

int main(){
	ll t; cin >> t;
	while(t--){
		string s,t; cin >> s >> t;
		ll m = t.size();
		for(ll i=s.size()-1; i>=0; i--){
			string tmp;
			if(s[i]=='J'){
				tmp.push_back(t[m-1]);
				tmp += t.substr(0,m-1);
			}
			if(s[i]=='C'){
				tmp = t.substr(1);
				tmp.push_back(t[0]);
			}
			if(s[i]=='E'){
				tmp = t.substr((m+1)/2,m);
				if(m & 1) tmp.push_back(t[m/2]);
				tmp += t.substr(0,m/2);
			}
			if(s[i]=='A'){
				tmp = t;
				reverse(all(tmp));
			}
			if(s[i]=='P'){
				tmp = t;
				rep(j,m){
					if(tmp[j]=='0') tmp[j] = '9';
					else if('1'<=tmp[j] && tmp[j]<='9') tmp[j]--; 
				}
			}
			if(s[i]=='M'){
				tmp = t;
				rep(j,m){
					if(tmp[j]=='9') tmp[j] = '0';
					else if('0'<=tmp[j] && tmp[j]<'9') tmp[j]++;
				}
			}
			t = tmp;
		}
		cout << t << endl;
	}
}

C++: #include<iostream>
using namespace std;
string A(string str){
  string str1;
  for(int i=0;i<str.size();i++) str1+=str[str.size()-i-1];
   return str1;
}
string C(string str){
  string str1;
  for(int i=1;i<str.size();i++) str1+=str[i];
  str1+=str[0];
  return str1;
}
string J(string str){
  string str1;
  str1+=str[str.size()-1];
  for(int i=0;i<str.size()-1;i++) str1+=str[i];
   return str1;
}
string E(string str){
  string str1;
  int a=0;
  if(str.size()%2) a=1;
  for(int i=(str.size()/2)+a;i<str.size();i++) str1+=str[i];
  if(a==1) str1+=str[str.size()/2],a=0;
  for(int i=0;i<(str.size()/2+a);i++) str1+=str[i];
  return str1;
}
string M(string str){
  string str1;
  for(int i=0;i<str.size();i++){
    if(str[i]>='0' && str[i]<'9') str[i]++;
    else if(str[i]=='9')str[i]='0';
    str1+=str[i];
  }
  return str1;
}
string P(string str){
  string str1;
  for(int i=0;i<str.size();i++){
    if(str[i]>'0' && str[i]<='9') str[i]--;
    else if(str[i]=='0') str[i]='9';
    str1+=str[i];
  }
  return str1;
}

int main(){
  int n;
  string str,str1;
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>str;
    cin>>str1;
    for(int j=str.size()-1;j>=0;j--){
      if(str[j]=='A') str1=A(str1);
      else if(str[j]=='J') str1=J(str1);
      else if(str[j]=='C') str1=C(str1);
      else if(str[j]=='E') str1=E(str1);
      else if(str[j]=='P') str1=P(str1);
      else str1=M(str1);
      }
    cout<<str1<<endl;
  }
  return 0;
}