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 n;
string people;
string result;

string rshift(string s) {
	string ret;
	ret += s[s.length() - 1];
	for (int i = 0; i < s.length() - 1; i++) ret += s[i];
	return ret;
}

string lshift(string s) {
	string ret;
	for (int i = 1; i < s.length(); i++) ret += s[i];
	ret += s[0];
	return ret;
}

string swaplr(string s) {
	string pre, suf;
	for (int i = 0; i < s.length() / 2; i++) pre += s[i];
	for (int i = 0; i < s.length() / 2; i++) suf += s[s.length() / 2 + s.length() % 2 + i];
	if (s.length() % 2) return suf + s[s.length() / 2] + pre;
	return suf + pre;
}

string reverse(string s) {
	int l = 0, r = s.length() - 1;
	while (l < r) {
		swap(s[l], s[r]);
		l++;
		r--;
	}
	return s;
}

string decrements(string s) {
	for (int i = 0; i < s.length(); i++) {
		if ('0' <= s[i] && s[i] <= '9') {
			if (s[i] == '0') s[i] = '9';
			else s[i]--;
		}
	}
	return s;
}

string increments(string s) {
	for (int i = 0; i < s.length(); i++) {
		if ('0' <= s[i] && s[i] <= '9') {
			if (s[i] == '9') s[i] = '0';
			else s[i]++;
		}
	}
	return s;
}

int main() {
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> people >> result;
		for (int j = people.length() - 1; j >= 0; j--) {
			char c = people[j];
			if (c == 'J') result = rshift(result);
			if (c == 'C') result = lshift(result);
			if (c == 'E') result = swaplr(result);
			if (c == 'A') result = reverse(result);
			if (c == 'P') result = decrements(result);
			if (c == 'M') result = increments(result);
		}
		cout << result << endl;
	}
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int main(void){
    int n;
    cin>>n;
    string order;
    string word;
    for (int i=0;i<n;i++) {
        cin>>order>>word;
        for (int j=order.size()-1;j>=0;j--) {
            if (order[j]=='J') {
                if (word.size()!=1) {
                    word=word[word.size()-1]+word;
                    word.erase(word.size()-1,1);
                    //cout<<word<<endl;
                }
            } else if (order[j]=='C') {
                if (word.size()!=1) {
                    word=word+word[0];
                    word.erase(0,1);
                }
            } else if (order[j]=='E') {
                if (word.size()%2==0) {
                    string one=word.substr(0,word.size()/2);
                    string another=word.substr(word.size()/2,word.size()/2);
                    word=another+one;
                } else {
                    string one=word.substr(0,word.size()/2);
                    string another=word.substr(word.size()/2+1,word.size()/2);
                    word=another+word[word.size()/2]+one;
                }
            } else if (order[j]=='A') {
                reverse(word.begin(),word.end());
                //cout<<word<<endl;
            } else if (order[j]=='P') {
                for (int k=0;k<word.size();k++) {
                    if (word[k]=='0') {
                        word[k]='9';
                    } else if (word[k]=='1') {
                        word[k]='0';
                    } else if (word[k]=='2') {
                        word[k]='1';
                    } else if (word[k]=='3') {
                        word[k]='2';
                    } else if (word[k]=='4') {
                        word[k]='3';
                    } else if (word[k]=='5') {
                        word[k]='4';
                    } else if (word[k]=='6') {
                        word[k]='5';
                    } else if (word[k]=='7') {
                        word[k]='6';
                    } else if (word[k]=='8') {
                        word[k]='7';
                    } else if (word[k]=='9') {
                        word[k]='8';
                    }
                }
            } else if (order[j]=='M') {
                for (int k=0;k<word.size();k++) {
                    if (word[k]=='0') {
                        word[k]='1';
                    } else if (word[k]=='1') {
                        word[k]='2';
                    } else if (word[k]=='2') {
                        word[k]='3';
                    } else if (word[k]=='3') {
                        word[k]='4';
                    } else if (word[k]=='4') {
                        word[k]='5';
                    } else if (word[k]=='5') {
                        word[k]='6';
                    } else if (word[k]=='6') {
                        word[k]='7';
                    } else if (word[k]=='7') {
                        word[k]='8';
                    } else if (word[k]=='8') {
                        word[k]='9';
                    } else if (word[k]=='9') {
                        word[k]='0';
                    }
                }
                //cout<<word<<endl;
            }
        }
        cout<<word<<endl;
    }
}