Encrypted Love

#include<bits/stdc++.h>
#include<string.h>	
using namespace std;
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
long long num,t=0,i;
cin>>num;
while(num--)
{
string str;
cin>>str;
for(i=0;i<str.length();i++)
{


if(str[i]-48>0 ) {
t=(t*10)+(str[i]-48);
}
if(str[i]-48<0 || i==str.length()-1){
//cout<<t<<" ";
switch (t)
{
case 2: cout<<"a";
break;
case 22: cout<<"b";
break;
case 222: cout<<"c";
break;
case 3: cout<<"d";
break;
case 33: cout<<"e";
break;
case 333: cout<<"f";
break;
case 4: cout<<"g";
break;
case 44: cout<<"h";
break;
case 444:cout<<"i";
break;
case 5:cout<<"j";
break;
case 55:cout<<"k";
break;
case 555:cout<<"l";
break;
case 6:cout<<"m";
break;
case 66:cout<<"n";
break;
case 666:cout<<"o";
break;
case 7:cout<<"p";
break;
case 77:cout<<"q";
break;
case 777:cout<<"r";
break;
case 7777:cout<<"s";
break;
case 8:cout<<"t";
break;
case 88:cout<<"u";
break;
case 888:cout<<"v";
break;
case 9:cout<<"w";
break;
case 99:cout<<"x";
break;
case 999:cout<<"y";
break;
case 9999:cout<<"z";
break;
}
t=0;
}
}
cout<<endl;
}
return 0;
}