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 <string>
#include <algorithm>

using namespace std;

int main(int argc, char const *argv[])
{
	string order;
	string mess;

	int n;
	int sz;

	cin>>n;

	for(int i1=0;i1<n;i1++){
		cin>>order;
		cin>>mess;

		reverse(order.begin(), order.end());
		sz=mess.size();

		for(int i2=0;i2<order.size();i2++){
			if(order[i2]=='J'){
				mess=mess[sz-1]+mess.substr(0,sz-1);
			}
			else if(order[i2]=='C'){
				mess=mess.substr(1,sz-1)+mess[0];
			}
			else if(order[i2]=='E'){
				string l=mess.substr(0,sz/2);
				string r=mess.substr(sz/2,sz/2);

				if(sz%2==0) mess=r+l;
				else mess=r+mess[sz]+l;
			}
			else if(order[i2]=='A'){
				reverse(mess.begin(), mess.end());
			}
			else if(order[i2]=='P'){
				for(int i3=0;i3<sz;i3++){
					if(mess[i3]>='1' && mess[i3]<='9') mess[i3]--;
					else if(mess[i3]=='0') mess[i3]='9';
				}
			}
			else {// M
				for(int i3=0;i3<sz;i3++){
					if(mess[i3]>='0' && mess[i3]<='8') mess[i3]++;
					else if(mess[i3]=='9') mess[i3]='0';
				}
			}
		}

		cout<<mess<<endl;

	}

	return 0;
}

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

using namespace std;

#define rep(i, n) REP((i), 0, (n))
#define REP(i, a, n) for(int i=(a); i<(n); i++)

void j_inv(string& s) {
    s = s.back() + s.substr(0, s.size()-1);
}

void c_inv(string& s) {
    s = s.substr(1, s.size()-1) + s[0];
}

void e_inv(string& s) {
    if(s.size()%2 == 0)
        s = s.substr(s.size()/2, s.size()/2) + s.substr(0, s.size()/2);
    else
        s = s.substr(s.size()/2+1, s.size()/2) + s[s.size()/2] + s.substr(0, s.size()/2);
}

void a_inv(string& s) {
    reverse(s.begin(), s.end());
}

void p_inv(string& s) {
    rep(i, s.size())
        if(isdigit(s[i])) s[i] = (s[i]=='0'? '9':s[i]-1);
}

void m_inv(string& s) {
    rep(i, s.size())
        if(isdigit(s[i])) s[i] = (s[i]=='9'? '0':s[i]+1); 
}

int main() {
    int n; cin >> n;
    rep(_, n) {
        string m; cin >> m;
        string s; cin >> s;
        for(int j=m.size()-1; j>=0; j--) {
            switch(m[j]) {
                case 'J': j_inv(s); break;
                case 'C': c_inv(s); break;
                case 'E': e_inv(s); break;
                case 'A': a_inv(s); break;
                case 'P': p_inv(s); break;
                case 'M': m_inv(s); break;
            }
        }
        cout << s << 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;
	cin.ignore();
	for (; N; N--) {
		string str, ope;
		getline(cin, ope);
		getline(cin, str);
		for (int i = ope.size() - 1; i >= 0; i--) {
			str = F[ope[i]].f(str);
		}
		cout << "--- ";
		cout << str << endl;
	}


	return 0;
}