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

int main(int argc, char **argv) {
    char input[5];
    int hour=0,sum=0;
    float time=0,minute=0;
    while(scanf("%s",input)!=EOF)
    {
        if(strcmp(input,"END")!=0)
        {
            hour=atoi(input)*60;
            minute=(atof(input)-atoi(input))*100;
            sum=sum+hour+minute;
            time=(float)(sum/60*100+sum%60)/100.0;
        }
        else
        {
            printf("%.2f\n",time);
            time=0;
            sum=0;
            hour=0;
            minute=0;
        }
    }
	return 0;
}