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

using namespace std;

int main()
{
  char keitai[10][5] = {{'*', '*', '*', '*', '*'},
                        {'.', ',', '!', '?', ' '},
                        {'a', 'b', 'c', '*', '*'},
                        {'d', 'e', 'f', '*', '*'},
                        {'g', 'h', 'i', '*', '*'},
                        {'j', 'k', 'l', '*', '*'},
                        {'m', 'n', 'o', '*', '*'},
                        {'p', 'q', 'r', 's', '*'},
                        {'t', 'u', 'v', '*', '*'},
                        {'w', 'x', 'y', 'z', '*'},
  };
  string s;
  int x , c;
  char p;
  int n;
  cin >> n;
  cin.ignore();
  REP(k, n){
    getline(cin, s);
    x = c = 0;
    p = '\0';
    REP(i, s.size()){
      int j;
      j = s[i] - '0';
      if(j){
        if(x == j){
          if(keitai[j][c + 1] == '*'){
            c = 0;
            p = keitai[j][c];
          }else{
            c++;
            p = keitai[j][c];
          }
        }else{
          c = 0;
          p = keitai[j][c];
        }
      }else{
        if(p != '\0')
          cout << p;
        p = '\0';
      }
      x = j;
    }
    cout << endl;
  }
}

C++: #include<iostream>
#include<cstring>
using namespace std;
int main(){
	int n,temp,sum,box[]={1,5,3,3,3,3,3,4,3,4};
	char s[1030];
	char tab[20][10]={" ",".,!? ","abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"};
	cin>>n;
	while(n--){
		cin>>s;
		sum=0;
		for(int i=0;i<(int)strlen(s);i++){
			if(s[i]=='0'){
				if(sum!=0){
					cout<<tab[temp][(sum-1)%box[temp]];
				}
				sum=0;
			}
			else{
				temp=s[i]-'0';
				sum++;
			}
		}
		cout<<endl;
	}
	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<cstring>

using namespace std;
int main(){
  char m[9][5]={{'.',',','!','?',' '},
		{'a','b','c','1','1'},
		{'d','e','f','1','1'},
		{'g','h','i','1','1'},
		{'j','k','l','1','1'},
		{'m','n','o','1','1'},
		{'p','q','r','s','1'},
		{'t','u','v','1','1'},
		{'w','x','y','z','1'}};
  int a,count=0,c,d;
  char b[1025];
  cin>>a;
  for(int i=0;i<a;i++){
    scanf("%s",b);
    c=strlen(b);
    for(int j=0;j<c;j++){
      if(b[j]!='0')count++;
      else
	if(b[j-1]!=0){
	  d=(int)(b[j-1])-48;

	  if(d==1)
	    if(count%5!=0)
	      cout<<m[d-1][count%5-1];
	    else cout<<m[d-1][4];

	  else if(d==7 || d==9)
	    if(count%4!=0)
	      cout<<m[d-1][count%4-1];
	    else cout<<m[d-1][3];

	  else
	    if(count%3!=0)
	      cout<<m[d-1][count%3-1];
	    else cout<<m[d-1][2]; 
	  count=0;
	}
    }
    cout<<endl;
  }
  return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;
int main(){
	string list[] = {
		"",".,!? ","abc","def"
		,"ghi","jkl","mno"
		,"pqrs","tuv","wxyz"
	};
	string str,out;
	int times;
	cin >> times;
	for(int i =0 ;i<times;i++){
		cin >> str;
		char cur,cash='a';
		int count = 0,idx=0;
		int n = 0;
		while(n <str.size()){
			cur = str[n];

			if(cur == '0'){
					if (idx == 0) count = 0;
					else {
						out +=list[idx][count%=list[idx].size()];
						count =0;
						idx=0;
					}
			}
			else if(cur ==cash){
				count +=1;
			}
			else{
				idx= (int)(cur - '0');
			}
			cash = cur;
			n++;
		}//?????????????????°???????????????
		cout << out << endl;
		out ="";
	}
		return 0;
}

C++: #include<iostream>
#include<vector>
#include<string>
using namespace std;

int main() {
	int a;
	cin >> a;
	for (int b = 0; b < a; b++) {
		string c;
		cin >> c;
		string s = "";
		string p = "";
		for (char d : c) {
			if (d == '0') {
				if (p.length()) {
					if (p[0] == '1') {
						switch (p.length()%5) {
						case 1:s += '.'; break;
						case 2:s += ','; break;
						case 3:s += '!'; break;
						case 4:s += '?'; break;
						case 0:s += ' '; break;
						}
					}
					else if (p[0] == '9') {
						switch (p.length() % 4) {
						case 0:s += 'z'; break;
						case 1:s += 'w'; break;
						case 2:s += 'x'; break;
						case 3:s += 'y'; break;
						}
					}
					else if (p[0] == '7') {
						switch (p.length() % 4) {
						case 0:s += 's'; break;
						case 1:s += 'p'; break;
						case 2:s += 'q'; break;
						case 3:s += 'r'; break;
						}
					}
					else if (p[0] == '8') {
						switch (p.length() % 3) {
						case 0:s += 'v'; break;
						case 1:s += 't'; break;
						case 2:s += 'u'; break;
						}
					}
					else {
						int u=((p[0] - 48) * 3 + p.length()%3 + 90);
						if (p.length() % 3 == 0)u += 3;
						s += u;
					}
				}
				p = "";
			}
			else p += d;
		}
		cout << s << endl;
	}
}

C++: #include <iostream>
#include <string>
#include <vector>
using namespace std;

int main(void){
  int n, i, cnt;
  string str, ans;
  char init;
  vector<string> mp{"", ".,!? ","abc","def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"};
  cin >> n;
  while(n--){
    cin >> str;
    ans = "";
    i = 0;
    while(i < str.length()){
      while(str[i] == '0'){
        i++;
      }
      if(i >= str.length()){
        break;
      }
      init = str[i];
      cnt = 0;
      while(i < str.length() and str[i] == init){
        i++;
        cnt++;
      }
      ans += mp[init - '0'][(cnt - 1) % mp[init - '0'].length()];
    }
    cout << ans << endl;
  }
  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int main() {
	int n;
	cin>>n;
	for(int i=0;i<n;i++){
		string str,one=".,!? ",ans;
		cin>>str;
		for(int j=0,co=0,num=0;j<=str.size();j++){
			if(num==str[j]-'0')co++;
			else{
				if(num==1)ans+=one[co%5];
				else if(num==7)ans+=co%4+'p';
				else if(num==8)ans+=co%3+'t';
				else if(num==9)ans+=co%4+'w';
				else if(num>1)ans+=co%3+'a'+3*(num-2);
				co=0;
				num=str[j]-'0';
			}
		}
		cout<<ans<<endl;
	}
}