//poj 2501
#include<stdio.h>
#include<string.h>
#include<stdlib.h>

char ch[250];

int main()
{
	double h=0,m=0,s=0,t=0,sum=0,d=0;
	int i,j,v=0;
	while(scanf("%lf:%lf:%lf",&h,&m,&s)!=EOF)
	{
		memset(ch,NULL,sizeof(ch));
		gets(ch);
		if(ch[0]==NULL)
		{
			sum=((h*3600+m*60+s-t)*(v/3.6))/1000.0;
			printf("%02d:%02d:%02d %.2lf km\n",(int)h,(int)m,(int)s,sum+d);
		}
		else if(ch[0]==' ')
		{
			d+=(h*3600+m*60+s-t)*(v/3.6)/1000.0;
			v=atoi(ch);
			t=h*3600+m*60+s;
		}
	}
	return 0;
}