Go: // Keitai Message
// http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=2006&lang=jp
package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var table = []string{
	"",
	".,!? ",
	"abc",
	"def",
	"ghi",
	"jkl",
	"mno",
	"pqrs",
	"tuv",
	"wxyz",
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)

	n := nextInt(sc)

	for i := 0; i < n; i++ {
		message := nextString(sc)
		currentButton, count := 0, 0
		for _, word := range message {
			// 確定の処理を書く
			if word == '0' {
				if currentButton == 0 {
					count = 0
					continue
				}
				mod := len(table[currentButton])
				tmp := table[currentButton][(count-1)%mod]
				currentButton, count = 0, 0
				fmt.Printf("%c", tmp)
			} else {
				count++
				currentButton = int(word) - 48 // '0'はASCIIで48
			}
		}
		fmt.Println()
	}
}

func nextInt(sc *bufio.Scanner) int {
	sc.Scan()
	i, err := strconv.Atoi(sc.Text())
	if err != nil {
		panic(err)
	}
	return i
}

func nextString(sc *bufio.Scanner) string {
	sc.Scan()
	return sc.Text()
}

C++: #include <iostream>
#include <string>
#include <array>
#include <vector>
#include <math.h>
#include <algorithm>
#include <set>
#include <deque>
#include <utility>
#include <queue>

#define MAX 100005
#define ll long long int
using namespace std;

int main(void)
{
	string s; // input
	int n;
	int i, j;

	string an;
	int zero = 0; // zero?????´???

	vector <string> ans;
	queue <char> qu;

	char temp;
	int count = 0;
	char tempm; //mozi???????????????????´?




	cin >> n;

	for (i = 0; i < n; i++) {
		cin >> an;

		for (j = 0; j < an.size(); j++) { //qu?????°?????????
			qu.push(an[j]);

		}



		
		while (qu.empty() == 0) {
			count = 0;
			tempm = 'n'; //?????????


			while (1) {
				temp = qu.front();
				if (temp != '0') {
					tempm = temp;
					count++;
					qu.pop();
				}
				else { //0?????£??????
					qu.pop();
					break;
				}


			}



			if (tempm == '1') { // 1?????¨???
				count = count % 5;

				switch (count) {
				case 1:
					s.push_back('.');
					break;
				case 2:
					s.push_back(',');
					break;
				case 3:
					s.push_back('!');
					break;
				case 4:
					s.push_back('?');
					break;
				case 0:
					s.push_back(' ');
					break;
				}
			}
			else if (tempm == '2') { // 2
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('a');
					break;
				case 2:
					s.push_back('b');
					break;
				case 0:
					s.push_back('c');
					break;

				}
			}
			else if (tempm == '3') { // 3
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('d');
					break;
				case 2:
					s.push_back('e');
					break;
				case 0:
					s.push_back('f');
					break;

				}
			}
			else if (tempm == '4') { // 4
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('g');
					break;
				case 2:
					s.push_back('h');
					break;
				case 0:
					s.push_back('i');
					break;

				}
			}
			else if (tempm == '5') { // 5
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('j');
					break;
				case 2:
					s.push_back('k');
					break;
				case 0:
					s.push_back('l');
					break;

				}
			}
			else if (tempm == '6') { // 6
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('m');
					break;
				case 2:
					s.push_back('n');
					break;
				case 0:
					s.push_back('o');
					break;

				}
			}
			else if (tempm == '7') { // 7
				count = count % 4;
				switch (count) {
				case 1:
					s.push_back('p');
					break;
				case 2:
					s.push_back('q');
					break;
				case 3:
					s.push_back('r');
					break;
				case 0:
					s.push_back('s');
					break;

				}
			}
			else if (tempm == '8') { // 8
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('t');
					break;
				case 2:
					s.push_back('u');
					break;
				case 0:
					s.push_back('v');
					break;

				}
			}
			else if (tempm == '9') { // 9
				count = count % 3;
				switch (count) {
				case 1:
					s.push_back('w');
					break;
				case 2:
					s.push_back('x');
					break;
				case 3:
					s.push_back('y');
					break;
				case 0:
					s.push_back('z');

				}
			}




		}

		ans.push_back(s);
		



		s.clear();
	}

	for (i = 0; i < ans.size(); i++) {
		cout << ans[i] << endl;
	}


	return (0);
}

C++: #include <cstdio>

const char *TABLE[] = {
	".,!? ",
	"abc",
	"def",
	"ghi",
	"jkl",
	"mno",
	"pqrs",
	"tuv",
	"wxyz"
};

int main(){
	int N;
	scanf("%d", &N);
	while(N--){
		char input[1025];
		scanf("%s", input);
		int key = -1, idx = -1;
		for(char *p = input; *p != '\0'; p++){
			int k = *p - '0' - 1;
			if(k < 0){
				if(idx >= 0 && key >= 0){
					putc(TABLE[key][idx], stdout);
					idx = -1;
				}
			}else{
				if(k != key){ idx = -1; }
				if(TABLE[k][++idx] == '\0'){ idx = 0; }
			}
			key = k;
		}
		puts("");
	}
	return 0;
}

C++: #include<iostream>
#include<string>

using namespace std;

int main(){
	int n;
	cin>>n;
	for(int i=0;i<n;i++){
		string input;
		int count=1;
		
		cin>>input;
		char first=input[0];
		for(int j=1;j<input.size();j++){
			if(first==input[j])count++;
			if(input[j]=='0'){
				if(input[j+1]=='0')continue;
				switch(first){
					case '1':
						switch(count%5){
							case 1:cout<<".";break;
							case 2:cout<<",";break;
							case 3:cout<<"!";break;
							case 4:cout<<"?";break;
							case 0:cout<<" ";break;
						}break;
					case '2':
						switch(count%3){
							case 1:cout<<"a";break;
							case 2:cout<<"b";break;
							case 0:cout<<"c";break;
						}break;
					case '3':
						switch(count%3){
							case 1:cout<<"d";break;
							case 2:cout<<"e";break;
							case 0:cout<<"f";break;
						}break;
					case '4':
						switch(count%3){
							case 1:cout<<"g";break;
							case 2:cout<<"h";break;
							case 0:cout<<"i";break;
						}break;
					case '5':
						switch(count%3){
							case 1:cout<<"j";break;
							case 2:cout<<"k";break;
							case 0:cout<<"l";break;
						}break;
					case '6':
						switch(count%3){
							case 1:cout<<"m";break;
							case 2:cout<<"n";break;
							case 0:cout<<"o";break;
						}break;
					case '7':
						switch(count%4){
							case 1:cout<<"p";break;
							case 2:cout<<"q";break;
							case 3:cout<<"r";break;
							case 0:cout<<"s";break;
						}break;
					case '8':
						switch(count%3){
							case 1:cout<<"t";break;
							case 2:cout<<"u";break;
							case 0:cout<<"v";break;
						}break;
					case '9':
						switch(count%4){
							case 1:cout<<"w";break;
							case 2:cout<<"x";break;
							case 3:cout<<"y";break;
							case 0:cout<<"z";break;
						}break;
				}
				first=input[j+1];
				count=0;
			}	
		}
		
			cout<<endl;	
	}
}