#include <stdio.h>
#include <stdlib.h>
#include<string.h>

int main(int argc, char **argv) {
    char c[50];
    int min,hour,minutes=0;
    while(fgets(c,50,stdin)!=NULL)
    {
        if(strcmp(c,"END\n")!=0)
        {
            sscanf(c,"%d.%d",&hour,&min);
            minutes+=(min+hour*60);
        }
        else
        {
            printf("%d.%02d\n",minutes/60,minutes%60);
            minutes=0;
        }
    }

    return 0;
}