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

C++: #include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main()
{
	int n;
	cin >> n;
	while (n--)
	{
		string a, b;
		cin >> b >> a;
		reverse(b.begin(),b.end());
		for (int i = 0; i < b.size(); i++)
		{
			if (b[i] == 'A')
				reverse(a.begin(), a.end());
			else if (b[i] == 'C')
			{
				string temp;
				temp = a[0];
				a.erase(a.begin(), a.begin() + 1);
				a += temp;
			}
			else if (b[i] == 'J')
			{
				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;
			}
			else if (b[i] == 'E')
			{
				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;
				}
				else 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;
				}
			}
			else if (b[i] == 'P')
			{
				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]--;
					}
				}
			}
			else if (b[i] == 'M')
			{
				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 <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <set>
#include <map>
#include <string>
#include <stack>
#include <queue>
#include <cmath>
#include <cstdio>
#include <istream>
#include <sstream>
#include <iomanip>
using namespace std;

typedef ostringstream oss;
typedef istringstream iss;

string J(string str) {
	str += str[0];
	str.erase(str.begin());
	return str;
}

string C(string str) {
	str.insert(str.begin(), *(str.rbegin()));
	str.erase(str.size() - 1);
	return str;
}

string E(string str) {
	for (int i = 0; i < str.size() / 2; i++) {
		swap(str[i], str[(str.size() + 1) / 2  + i]);
	}
	return str;
}

string A(string str) {
	for (int i = 0; i < str.size() / 2; i++) {
		swap(str[i], str[str.size() - 1 - i]);
	}
	return str;
}

string P(string str) {
	for (int i = 0; i < str.size(); i++) {
		if (str[i] >= '0' && str[i] <= '8') {
			str[i]++;
		}else if (str[i] == '9') {
			str[i] = '0';
		}
	}
	return str;
}

string M(string str) {
	for (int i = 0; i < str.size(); i++) {
		if (str[i] >= '1' && str[i] <= '9') {
			str[i]--;
		}else if (str[i] == '0') {
			str[i] = '9';
		}
	}
	return str;
}

struct pFunc
{
	pFunc(){}
	pFunc(string (*p)(string str)) : f(p) {}
	string (*f)(string str);
};


int main(void) {
	map<char, pFunc> F;
	F['J'] = pFunc(C);
	F['C'] = pFunc(J);
	F['E'] = pFunc(E);
	F['A'] = pFunc(A);
	F['P'] = pFunc(M);
	F['M'] = pFunc(P);

	int N;
	cin >> N;
	for (; N; N--) {
		string str, ope;
		cin.ignore();
		getline(cin, ope);
		getline(cin, str);
		for (int i = ope.size() - 1; i >= 0; i--) {
			str = F[ope[i]].f(str);
		}
		cout << str << endl;
	}


	return 0;
}