#include<stdio.h>

int main(void)
{
 //   freopen("in.txt","r",stdin);
    int n, hour, minute, stimes;
    char c;
    scanf("%d", &n);
    while(n--){
        scanf("%d%c%d", &hour, &c, &minute);
        if(minute!=0)
            stimes = 0;
        else if(hour==12)
            stimes = 24;
        else
            stimes = (hour+12)%24;
        printf("%d\n", stimes);
    }
    return 0;
}