#include<stdio.h>

#include<stdlib.h>

int main()

{

int n;

scanf("%d",&n);

getchar();

int a;

int i, j;

char m[200];

while (n--)

{

a = 0;

gets(m);

j = strlen(m);

for (i = 0; i < j; i++)

{

if (m[i] <= 122 && m[i]>=97)

{

a++;

}

}

a = a % 26;

switch (a)

{

case 0:printf("z"); break;

case 1:printf("a"); break;

case 2:printf("b"); break;

case 3:printf("c"); break;

case 4:printf("d"); break;

case 5:printf("e"); break;

case 6:printf("f"); break;

case 7:printf("g"); break;

case 8:printf("h"); break;

case 9:printf("i"); break;

case 10:printf("j"); break;

case 11:printf("k"); break;

case 12:printf("l"); break;

case 13:printf("m"); break;

case 14:printf("n"); break;

case 15:printf("o"); break;

case 16:printf("p"); break;

case 17:printf("q"); break;

case 18:printf("r"); break;

case 19:printf("s"); break;

case 20:printf("t"); break;

case 21:printf("u"); break;

case 22:printf("v"); break;

case 23:printf("w"); break;

case 24:printf("x"); break;

case 25:printf("y"); break;

}

printf("\n");

}

getchar();

return 0;

}