poj2840

//C

#include

int main(){

int n;

scanf("%d",&n);

while(n--){

int h,m;

char c;

scanf("%d%c%d",&h,&c,&m);

if(m==0){

if(h>=1&&h<=12)

 printf("%d\n",h+12);

else if(h>=13&&h<=23)

 printf("%d\n",h-12);

else if(h==0)

 printf("12\n");

}

else if(m!=0)

printf("0\n");

} 

return 0;

}