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++: // Enjoy your stay.

#include <bits/stdc++.h>

#define EPS 1e-9
#define INF 1070000000LL
#define MOD 1000000007LL
#define fir first
#define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++)
#define ite iterator
#define mp make_pair
#define mt make_tuple
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define pb push_back
#define sec second
#define sz(x) ((int)(x).size())

using namespace std;

typedef istringstream iss;
typedef long long ll;
typedef pair<ll,ll> pi;
typedef stringstream sst;
typedef vector<ll> vi;



int main(){
	cin.tie(0);
	ios_base::sync_with_stdio(0);
	
	int n;
	cin>>n;
	while(n--){
		string s,t;
		cin>>s>>t;
		for(int i=sz(s)-1;i>=0;i--){
			if(s[i]=='C'){
				t = t.substr(1) + t.substr(0,1);
			}
			if(s[i]=='J'){
				t = t.substr(sz(t)-1) + t.substr(0,sz(t)-1);
			}
			if(s[i]=='E'){
				if(sz(t)%2==0){
					t = t.substr(sz(t)/2) + t.substr(0,sz(t)/2);
				}else{
					t = t.substr(sz(t)/2+1) + t.substr(sz(t)/2,1) + t.substr(0,sz(t)/2);
				}
			}
			if(s[i]=='A'){
				reverse(t.begin(),t.end());
			}
			if(s[i]=='M'){
				rep(j,sz(t)){
					if(t[j]=='9')t[j]='0';
					else if(isdigit(t[j]))t[j]++;
				}
			}
			if(s[i]=='P'){
				rep(j,sz(t)){
					if(t[j]=='0')t[j]='9';
					else if(isdigit(t[j]))t[j]--;
				}
			}
			
		}
		cout<<t<<endl;
	}
}

C++: #include <cstdio>
#include <iostream>
#include <vector>
#include <list>
#include <cmath>
#include <fstream>
#include <algorithm>
#include <string>
#include <queue>
#include <set>
#include <map>
#include <complex>
#include <iterator>
#include <cstdlib>
#include <cstring>
#include <sstream>

using namespace std;

#define EPS (1e-10)
#define EQ(a,b) (abs((a) - (b)) < EPS)
#define EQV(a,b) (EQ((a).real(),(b).real()) && EQ((a).imag(),(b).imag()))

typedef complex<double> P;
typedef long long ll;

const double PI=4*atan(1.0);
const int MAX_SIZE = 10000;

int main(){

    int n;
    cin>>n;
    for(int i = 0; i < n; i++){
        string order;
        cin>>order;
        string given;
        cin>>given;
        for(int i = order.size()-1; i >= 0; i--){
            if(order[i]=='A'){
                reverse(given.begin(),given.end());
            }
            else if(order[i]=='J'){
                char ch=given[given.size()-1];
                given=given.substr(0,given.size()-1);
                given=ch+given;
            }
            else if(order[i]=='M'){
                for(int j = 0; j < given.size(); j++){
                    if(given[j]>='0'&&given[j]<='9'){
                        int num=(given[j]-'0'+1)%10;
                        given[j]=num+'0';
                    }
                }
            }
            else if(order[i]=='P'){
                for(int j = 0; j < given.size(); j++){
                    if(given[j]>='0'&&given[j]<='9'){
                        int num=(given[j]-'0'-1+10)%10;
                        given[j]=num+'0';
                    }
                }
            }
            else if(order[i]=='C'){
                char ch=given[0];
                given=given.substr(1,given.size()-1);
                given+=ch;
            }
            else if(order[i]=='E'){
                if(given.size()%2==0){
                    string prv=given.substr(0,given.size()/2);
                    string nxt=given.substr(given.size()/2,given.size()/2);
                    given=nxt+prv;
                }
                else{
                    string prv=given.substr(0,given.size()/2);
                    string nxt=given.substr((given.size()/2)+1,given.size()/2);
                    char ch=given[given.size()/2];
                    given=nxt+ch+prv;
                }
            }
        }
        cout<<given<<endl;
    }

    return 0;
}