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 <bits/stdc++.h>
using namespace std;
using ll=long long;
using vi=vector<int>;
using vvi=vector<vi>;
using vd=vector<double>;
using vvd=vector<vd>;
using vl=vector<ll>;
using vvl=vector<vl>;
using pii=pair<int,int>;
using vs=vector<string>;
#define rep(i,n) range(i,0,n)
#define range(i,a,n) for(int i=a;i<n;i++)
#define all(a) a.begin(),a.end()
#define LINF    	((ll)1ll<60)
#define INF     	((int)1<<30)
#define EPS     	(1e-9)
#define MOD     	(1000000007)
#define fcout(a)	cout<<setprecision(a)<<fixed
#define fs 			first
#define sc			second
#define PI			3.141592653589793

template<class S,class T>ostream& operator<<(ostream&os,pair<S,T>p){os<<"["<<p.first<<", "<<p.second<<"]";return os;};
template<class S>auto&operator<<(ostream&os,vector<S>t){bool a=1; for(auto s:t){os<<(a?"":" ")<<s; a=0;} return os;}

int main(){
	cin.tie(0);
   	ios::sync_with_stdio(false);
	
	int n;cin>>n;
  	rep(_,n){
  	    string q,s;
  	    cin>>q>>s;
  	    reverse(all(q));
  	    int l=s.size();
  	    for(auto Q:q){
  	        switch(Q){
  	            case 'J': s=s.substr(l-1)+s.substr(0,l-1); break;
  	            case 'C': s=s.substr(1)+s.substr(0,1); break;
  	            case 'E': s=s.substr((l+1)/2)+s.substr((l+1)/2-1,l%2)+s.substr(0,l/2); break;
  	            case 'A': reverse(all(s)); break;
  	            case 'P': for(auto&c:s)if(isdigit(c))c=(c=='0'?'9':c-1); break;
  	            case 'M': for(auto&c:s)if(isdigit(c))c=(c=='9'?'0':c+1); break;
  	        }
  	    }
        cout<<s<<endl;
  	}
  	
	return 0;
}

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

using namespace std;

string revJ(string t){
  string ret = t;
  ret.insert(ret.begin(),t[t.length()-1]);
  ret.erase(ret.end()-1);
  return ret;
}
string revC(string t){
  string ret = t;
  ret += t[0];
  ret.erase(ret.begin());
  return ret;
}
string revE(string t){
  char c=0;
  if(t.length()==1)return t;
  if(t.length()%2){
    c = t[t.length()/2];
    t.erase(t.begin()+t.length()/2);
  }
  string l = t.substr(0,t.length()/2);
  string r = t.substr(t.length()/2,t.length()-t.length()/2);
  if(c){
    return r+c+l;
  }else return r+l;
}
string revA(string t){
  string ret = t;
  reverse(ret.begin(),ret.end());
  return ret;
}
string revP(string t){
  //dec
  string ret = t;
  for(int i = 0; i < (signed)ret.length(); ++i){
    if( isdigit(ret[i]) ){
      ret[i]--;
      if(ret[i]<'0')ret[i]='9';
    }
  }
  return ret;
}
string revM(string t){
  //inc
  string ret = t;
  for(int i = 0; i < (signed)ret.length(); ++i){
    if( isdigit(ret[i]) ){
      ret[i]++;
      if(ret[i]>'9')ret[i]='0';
    }
  }
  return ret;
}

int main()
{
  int n;
  cin >> n;
  for(int i = 0; i < n; ++i){
    string order;
    string msg;
    cin >> order >> msg;
    for(int i = (int)order.length()-1; i>=0; --i){
      if( order[i] == 'J' ){
	msg = revJ( msg );
      }
      if( order[i] == 'C' ){
	msg = revC( msg );
      }
      if( order[i] == 'E' ){
	msg = revE( msg );
      }
      if( order[i] == 'A' ){
	msg = revA( msg );
      }
      if( order[i] == 'P' ){
	msg = revP( msg );
      }
      if( order[i] == 'M' ){
	msg = revM( msg );
      }
    }
    cout << msg << endl;
  }
  return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(){
  int n,i,j,k,orderlen,strlen;
  string order,str,tempstr1,tempstr2;
  char temp;
  cin >> n;
  for(i=0;i<n;i++){
    cin >> order;
    reverse(order.begin(),order.end());
    cin >> str;
    orderlen=order.size();
    strlen=str.size();
    for(j=0;j<orderlen;j++){
      if(order[j]=='J'){
    temp=str[strlen-1];
    for(k=strlen-1;k>=1;k--){
      str[k]=str[k-1];
    }
    str[0]=temp;
      }
      else if(order[j]=='C'){
    temp=str[0];
    for(k=0;k<strlen-1;k++){
      str[k]=str[k+1];
    }
    str[strlen-1]=temp;
      }
      else if(order[j]=='E'){
    tempstr1=tempstr2="";
    for(k=0;k<strlen;k++){
      if(k<strlen/2) tempstr1+=str[k];
      else tempstr2+=str[k];
    }
    str="";
    str+=tempstr2;
    str+=tempstr1;
    if(strlen%2==1){
      temp=str[0];
      for(k=0;k<strlen/2;k++){
        str[k]=str[k+1];
      }
      str[strlen/2]=temp;
    }
      }
      else if(order[j]=='A'){
    reverse(str.begin(),str.end());
      }
      else if(order[j]=='P'){
    for(k=0;k<strlen;k++){
      if('1'<=str[k]&&str[k]<='9') str[k]-=1;
      else if(str[k]=='0') str[k]='9';
    }
      }else{//M
    for(k=0;k<strlen;k++){
      if('0'<=str[k]&&str[k]<='8') str[k]+=1;
      else if(str[k]=='9') str[k]='0';
    }
      }
    }
    cout << str << endl;
  }
  return 0;
}