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++: //1240
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
char table[10]={'0','1','2','3','4','5','6','7','8','9'};
string now;
void A(){
reverse(now.begin(),now.end());
}
void J(){
char tmp=now[0];
for(int i=0;i<now.size()-1;i++)now[i]=now[i+1];
now[now.size()-1]=tmp;
}
void E(){
string a="",b="",c="";
for(int i=0;i<now.size();i++){
if(i<now.size()/2)a.push_back(now[i]);
else if(i==now.size()/2&&now.size()%2==1)c.push_back(now[i]);
else b.push_back(now[i]);
}
//reverse(a.begin(),a.end());
//reverse(b.begin(),b.end());
now=b+c+a;
}
void C(){
char tmp=now[now.size()-1];
for(int i=now.size()-1;i>0;i--)now[i]=now[i-1];
now[0]=tmp;
}
void P(){
for(int i=0;i<now.size();i++){
	if(now[i]-'0'==0)now[i]='9';
else 	if(now[i]-'0'==1)now[i]='0';
else 	if(now[i]-'0'==2)now[i]='1';
else 	if(now[i]-'0'==3)now[i]='2';
else 	if(now[i]-'0'==4)now[i]='3';
else 	if(now[i]-'0'==5)now[i]='4';
else 	if(now[i]-'0'==6)now[i]='5';
else 	if(now[i]-'0'==7)now[i]='6';
else 	if(now[i]-'0'==8)now[i]='7';
else 	if(now[i]-'0'==8)now[i]='8';
	}
}
void M(){
for(int i=0;i<now.size();i++){
	if(now[i]-'0'==0)now[i]='1';
	else if(now[i]-'0'==1)now[i]='2';
	 else if(now[i]-'0'==2)now[i]='3';
else 	if(now[i]-'0'==3)now[i]='4';
else 	if(now[i]-'0'==4)now[i]='5';
else 	if(now[i]-'0'==5)now[i]='6';
else 	if(now[i]-'0'==6)now[i]='7';
else 	if(now[i]-'0'==7)now[i]='8';
else 	if(now[i]-'0'==8)now[i]='9';
else 	if(now[i]-'0'==8)now[i]='0';
	}
}

int main(){
	int n;
	cin>>n;
for(int kki=0;kki<n;kki++){
	string a;
	cin>>a>>now;
	for(int i=a.size();i>=0;i--){
		if(a[i]=='A')A();
		if(a[i]=='C')J();
		if(a[i]=='P')P();
		if(a[i]=='M')M();
		if(a[i]=='E')E();
		if(a[i]=='J')C();
	//cout<<now<<endl;	
	}
	cout<<now<<endl;
}

	return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main()
{
	int n;
	cin >> n;
	while (n--)
	{
		string a, b;
		cin >> b >> a;
		bool A = true, C = true, J = true, E = true, P = true, M = true;
		reverse(b.begin(),b.end());
		for (int i = 0; i < b.size(); i++)
		{
			if (b[i] == 'A' && A == true)
			{
				reverse(a.begin(), a.end());
				A = false;
			}
			if (b[i] == 'C' && C == true)
			{
				string temp;
				temp = a[0];
				a.erase(a.begin(), a.begin() + 1);
				a += temp;
				C = false;
			}
			if (b[i] == 'J' && J == true)
			{
				string temp;
				temp = a[a.size() - 1];
				reverse(a.begin(), a.end());
				a.erase(a.begin(), a.begin() + 1);
				reverse(a.begin(), a.end());
				temp += a;
				a.clear();
				a = temp;
				J = false;
			}
			if (b[i] == 'E' && E== true)
			{
				E = false;
				if (a.size() % 2 == 0)
				{
					string temp, temp2;
					temp = a.substr(0, a.size() / 2);
					temp2 = a.substr(a.size() / 2, a.size());
					a.clear();
					a = temp2 + temp;
				}
				if (a.size() % 2 != 0)
				{
					string temp, temp2;
					temp = a.substr(0, a.size() / 2+1);
					temp2 = a.substr(a.size() / 2 + 1, a.size());
					a.clear();
					a.push_back(temp[temp.size() - 1]);
					reverse(temp.begin(), temp.end());
					temp.erase(temp.begin(), temp.begin() + 1);
					reverse(temp.begin(), temp.end());
					temp2 +=a+temp;
					a.clear();
					a = temp2;
				}
			}
			if (b[i] == 'P' && P == true)
			{
				P = false;
				for (int i = 0; i < a.size(); i++)
				{
					if (a[i] >= '0' && a[i] <= '9')
					{
						if (a[i] == '9')
							a[i] = '0';
						else if (a[i] == '0')
							a[i] = '9';
						else (int)a[i]--;
					}
				}
			}
			if (b[i] == 'M' && M == true)
			{
				M = false;
				for (int i = 0; i < a.size(); i++)
				{
					if (a[i] >= '0' && a[i] <= '9')
					{
						if ((int)a[i] == '0')
							a[i] = '9';
						else if ((int)a[i] == '9')
							a[i] = '0';
						else (int)a[i]++;
					}
				}
			}
		}
		cout << a << endl;
	}

}

C++: #include <bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin >> n;
	for(int i = 0;i < n;i++){
		string s, t;
		cin >> t >> s;
		int sz = s.size();
		
		for(int j = t.size()-1;j >= 0;j--){
			string ns;
			if(t[j] == 'J'){
				ns += s[sz-1];
				ns += s.substr(0, sz-1);
			}
			if(t[j] == 'C'){
				ns += s.substr(1, sz-1);
				ns += s[0];
			}
			if(t[j] == 'E'){
				int hf = sz / 2;
				ns += s.substr((sz+1)/2, hf);
				if(sz % 2) ns += s[hf];
				ns += s.substr(0, hf);
			}
			if(t[j] == 'A'){
				reverse(s.begin(), s.end());
				ns = s;
			}			
			if(t[j] == 'P'){
				for(int k = 0;k < sz;k++){
					if(s[k] >= '0' && s[k] <= '9'){
						if(s[k] == '0'){
							s[k] = '9';
						}else{
							s[k]--;
						}
					}
				}
				ns = s;
			}
			if(t[j] == 'M'){
				for(int k = 0;k < sz;k++){
					if(s[k] >= '0' && s[k] <= '9'){
						if(s[k] == '9'){
							s[k] = '0';
						}else{
							s[k]++;
						}
					}
				}
				ns = s;
			}
			s = ns;
//			cout << t[j] << endl;
//			cout << s << endl;
		}
		cout << s << endl;
	}
	
	return 0;
}