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>
#define rep(i,n)for(int i=0;i<n;i++)
using namespace std;

int main() {
	int n; cin >> n;
	rep(i, n) {
		string m, s; cin >> m >> s;
		reverse(m.begin(), m.end());
		for (char c : m) {
			switch (c) {
			case'C':rotate(s.begin(), ++s.begin(), s.end()); break;
			case'J':rotate(s.begin(), --s.end(), s.end()); break;
			case'E':s = s.substr((int)s.size() / 2 + (int)s.size() % 2) + s.substr((int)s.size() / 2, (int)s.size() % 2) + s.substr(0, (int)s.size() / 2); break;
			case'A':reverse(s.begin(), s.end()); break;
			case'M':transform(s.begin(), s.end(), s.begin(), [](char c) {
				if (c == '9')return'0';
				if ('0' <= c&&c < '9')return ++c;
				return c;
			}); break;
			case'P':transform(s.begin(), s.end(), s.begin(), [](char c) {
				if (c == '0')return'9';
				if ('0' < c&&c <= '9')return --c;
				return c;
			}); break;
			}
		}
		cout << s << endl;
	}
}

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

using namespace std;

int main(){
	int T;
	cin >> T;
	while(T--){
		string a, b;
		cin >> a >> b;
		for(int i = a.size() - 1; i >= 0; --i){
			if(a[i] == 'J'){
				b = b.substr(b.size() - 1) + b.substr(0, b.size() - 1);
			}else if(a[i] == 'C'){
				b = b.substr(1) + b.substr(0, 1);
			}else if(a[i] == 'E'){
				int half = b.size() / 2;
				for(int j = 0; j < half; ++j){
					swap(b[j], b[b.size() - half + j]);
				}
			}else if(a[i] == 'A'){
				reverse(b.begin(), b.end());
			}else if(a[i] == 'P'){
				for(int j = 0; j < b.size(); ++j){
					if(!isdigit(b[j])){ continue; }
					b[j] = (b[j] == '0' ? '9' : (b[j] - 1));
				}
			}else if(a[i] == 'M'){
				for(int j = 0; j < b.size(); ++j){
					if(!isdigit(b[j])){ continue; }
					b[j] = (b[j] == '9' ? '0' : (b[j] + 1));
				}
			}
		}
		cout << b << endl;
	}
	return 0;
}

C++: // AOJ 1240

#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>

using namespace std;

// “aB23d” to “B23da”.
// 1文字←にずらす
string J(string str)
{
	string ret = str.substr(1);
	ret += str[0];
	return ret;
}

// “aB23d” to “daB23”.
// 一文字→にずらす
string C(string str)
{
	string ret; ret += str[str.length()-1];
	ret += str.substr(0, str.length()-1);
	return ret;
}

// “e3ac” to “ace3”, and “aB23d” to “3d2aB”.
// 真ん中で分けて swap
// bugbug
string E(string str)
{
	string ret;
	if (str.length() % 2 == 0){
		ret = str.substr(str.length()/2);
		ret += str.substr(0, str.length()/2);
	}
	else {
		ret = str.substr(((str.length()-1)/2) + 1);
		ret += str[str.length()/2];
		ret += str.substr(0, (str.length()-1)/2);
	}

	return ret;
}

// “aB23d” to “d32Ba”.
// 反転
string A(string str)
{
	string ret = str;
	reverse(ret.begin(), ret.end());
	return ret;
}

// “aB23d” to “aB34d”, and “e9ac” to “e0ac”.
// 1足す
string P(string str)
{
	string ret;
	for (int i = 0; i < str.length(); i++){
		if (isdigit(str[i])){
			if (str[i] == '9'){
				ret += '0';
			}
			else {
				ret += str[i] + 1;
			}
		}
		else {
			ret += str[i];
		}
	}
	return ret;
}

// “aB23d” to “aB12d”, and “e0ac” to “e9ac”.
// 1引く
string M(string str)
{
	string ret;
	for (int i = 0; i < str.length(); i++){
		if (isdigit(str[i])){
			if (str[i] == '0'){
				ret += '9';
			}
			else {
				ret += str[i] - 1;
			}
		}
		else {
			ret += str[i];
		}
	}
	return ret;
}

int main(void)
{
	int n;
	cin >> n;
	while (n--){
		string person, str;
		cin >> person >> str;
		reverse(person.begin(), person.end());
		// JCPEAM
		// puts("");
		for (int i = 0; i < person.length(); i++){
			if (person[i] == 'J') str = C(str);
			else if (person[i] == 'C') str = J(str);
			else if (person[i] == 'P') str = M(str);
			else if (person[i] == 'E') str = E(str);
			else if (person[i] == 'A') str = A(str);
			else if (person[i] == 'M') str = P(str);
			// cout << str << endl;
		}
		// puts("");
		cout << str << endl;
	}
	return 0;
}

C++: #include <algorithm>
#include <cstdio>
#include <iostream>
#include <string>
#include <utility>
using namespace std;

//メッセージ復元
string back(string s, char c){
	string t="";
	if(c=='J'){
		char t1=s[s.size()-1];
		string t2=s.substr(0, s.size()-1);
		t+=t1+t2;
	}
	else if(c=='C'){
		char t1=s[0];
		string t2=s.substr(1, s.size()-1);
		t+=t2+t1;
	}
	else if(c=='E'){
		int size=s.size();
		char mid;
		if(size%2==1) mid=s[size/2];
		
		string t1=s.substr(0, size/2);
		string t2=s.substr((size+1)/2, size/2);
		
		t+=t2;
		if(size%2==1) t+=mid;
		t+=t1;
	}
	else if(c=='A'){
		t=s;
		reverse(t.begin(), t.end());
	}
	else if(c=='P'){
		for(int i=0; i<s.size(); ++i){
			if('0'<=s[i] && s[i]<='9'){
				if(s[i]=='0') t+='9';
				else t+=s[i]-1;
			}
			else t+=s[i];
		}
	}
	else if(c=='M'){
		for(int i=0; i<s.size(); ++i){
			if('0'<=s[i] && s[i]<='9'){
				if(s[i]=='9') t+='0';
				else t+=s[i]+1;
			}
			else t+=s[i];
		}	
	}
	return t;
}

int main(){
	long n;
	scanf(" %ld", &n);
	for(long i=0; i<n; ++i){
		string o; //order of the messenger	
		string m; //message given to the king
		cin >> o >> m;
		for(int j=o.size()-1; j>=0; --j)
			m=back(m, o[j]);		
		
		cout << m <<endl;
	}
	return 0;
}