#include<stdio.h>
int main(){
    int a,h,m;
    scanf("%d",&a);
    h=a/100;
    m=((a-h*100)/100)*60;
    h=h+10;
   if(0<=m&&10>m){printf("%02d:0%d\n",h,m);}
  else printf("%d:%d\n",h,m);
    
}