#include <stdio.h>
int main(){ 
int a,b,c,d;
int sum1,sum2,e,h,f;
scanf("%d%d%d%d",&a,&b,&c,&d);
sum1=a*60+b;
sum2=c*60+d;
h=sum2-sum1;
e=h/60;
f=h%60;
printf("%d %02d",e,f);
return 0;
}