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>
using namespace std;
string s, o;
void J() {
	string st = s[s.size() - 1] + s.substr(0, s.size() - 1);
	s = st;
	return;
}
void C() {
	string st = s.substr(1, s.size() - 1) + s[0];
	s = st;
	return;
}
void E() {
	string a, b, st;
	int k = (s.size() - s.size() % 2) / 2;
	a = s.substr(0, k);
	if (s.size() % 2)st = s[k];
	b = s.substr(k + s.size() % 2, k);
	s = b + st + a;
	return;
}
void A() {
	string st;
	for (int i = s.size() - 1; i >= 0; i--)st += s[i];
	s = st;
	return;
}
void P() {
	string st;
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == '0')st += '9';
		else if (s[i] == '1')st += '0';
		else if (s[i] == '2')st += '1';
		else if (s[i] == '3')st += '2';
		else if (s[i] == '4')st += '3';
		else if (s[i] == '5')st += '4';
		else if (s[i] == '6')st += '5';
		else if (s[i] == '7')st += '6';
		else if (s[i] == '8')st += '7';
		else if (s[i] == '9')st += '8';
		else st += s[i];
	}
	s = st;
	return;
}
void M() {
	string st;
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == '0')st += '1';
		else if (s[i] == '1')st += '2';
		else if (s[i] == '2')st += '3';
		else if (s[i] == '3')st += '4';
		else if (s[i] == '4')st += '5';
		else if (s[i] == '5')st += '6';
		else if (s[i] == '6')st += '7';
		else if (s[i] == '7')st += '8';
		else if (s[i] == '8')st += '9';
		else if (s[i] == '9')st += '0';
		else st += s[i];
	}
	s = st;
	return;
}
int main() {
	int n; cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> o >> s;
		for (int j = o.size() - 1; j > -1; j--) {
			if (o[j] == 'J')J();
			else if (o[j] == 'C')C();
			else if (o[j] == 'E')E();
			else if (o[j] == 'A')A();
			else if (o[j] == 'P')P();
			else if (o[j] == 'M')M();
		}
		cout << s << endl;
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
using ll=long long;
using vb=vector<bool>;
using vvb=vector<vb>;
using vd=vector<double>;
using vvd=vector<vd>;
using vi=vector<int>;
using vvi=vector<vi>;
using vl=vector<ll>;
using vvl=vector<vl>;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using tll=tuple<ll,ll>;
using tlll=tuple<ll,ll,ll>;
using vs=vector<string>;

#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define rep(i,n) range(i,0,n)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define range(i,a,n) for(int i=(a);i<(n);i++)

#define LINF ((ll)1ll<<60)
#define INF ((int)1<<30)
#define EPS (1e-9)
#define MOD (1000000007ll)
#define fcout(a) cout<<setprecision(a)<<fixed
#define fs first
#define sc second
#define PI 3.1415926535897932384

int dx[]={1,0,-1,0,1,-1,-1,1},dy[]={0,1,0,-1,1,1,-1,-1};

template<class T>bool chmax(T&a,T b){if(a<b){a=b; return true;}return false;}
template<class T>bool chmin(T&a,T b){if(a>b){a=b; return true;}return false;}
template<class S>S acm(vector<S>&a){return accumulate(all(a),S());}
template<class S>S max(vector<S>&a){return *max_element(all(a));}
template<class S>S min(vector<S>&a){return *min_element(all(a));}
void YN(bool b){cout<<(b?"YES":"NO")<<"\n";}
void Yn(bool b){cout<<(b?"Yes":"No")<<"\n";}
void yn(bool b){cout<<(b?"yes":"no")<<"\n";}

ll max(int a,ll b){return max((ll)a,b);} ll max(ll a,int b){return max(a,(ll)b);}
template<class T>void puta(T&&t){cout<<t<<"\n";}
template<class H,class...T>void puta(H&&h,T&&...t){cout<<h<<' ';puta(t...);}
template<class S,class T>ostream&operator<<(ostream&os,pair<S,T>p){os<<"["<<p.first<<", "<<p.second<<"]";return os;};
template<class S>auto&operator<<(ostream&os,vector<S>t){bool a=1; for(auto s:t){os<<(a?"":" ")<<s;a=0;} return os;}

string mr(string s,char c){
	string ret(s.size(),'a');
	if(c=='C'){
		if(s.size()==1)return s;
		ret=s.substr(1)+s[0];
	}
	if(c=='J'){
		if(s.size()==1)return s;
		ret=s[s.size()-1]+s.substr(0,s.size()-1);
	}
	if(c=='A'){
		reverse(all(s));
		return s;
	}
	if(c=='E'){
		ret=s.substr(s.size()/2+s.size()%2)+(s.size()%2==1?s.substr(s.size()/2,1):"")+s.substr(0,s.size()/2);
	}
	if(c=='M'){
		rep(i,s.size()){
			if('0'<=s[i]&&'9'>=s[i]){
				int num=s[i]-'0';
				num+=1;num%=10;
				ret[i]=char(num+'0');
			}
			else ret[i]=s[i];
		}
	}
	if(c=='P'){
		rep(i,s.size()){
			if('0'<=s[i]&&'9'>=s[i]){
				int num=s[i]-'0';
				num+=9;num%=10;
				ret[i]=char(num+'0');
			}
			else ret[i]=s[i];
		}
	}
	return ret;
}

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n;
	cin>>n;
	while(n--){
		string s,op;
		cin>>op>>s;
		rrep(i,op.size()){
			s=mr(s,op[i]);
		}
		cout<<s<<"\n";
	}
}