#include <bits/stdc++.h>

 using namespace std;

 int main()

 {

     int aa,bb,n,no;

     double s,sec;

     char a[];

     bool f;

     scanf("%d%lf",&n,&s);

     while(~scanf("%d",&no))

     {

         sec = ;

         f = false;

         printf("%3d:",no);

         for(int i = ; i < n; ++i)

         {

             scanf("%s",a);

             if(a[]=='-')

             {

                 f = true;

 //                break;

             }

             else sec += (a[]-'')*+(a[]-'')*+(a[]-'')*+(a[]-'')*+(a[]-'');

         }

         if(f) {puts(" -");continue;}

         aa = (sec/s+0.5)/;

         bb = (int)(sec/s+0.5)%;

         printf("%2d:%02d min/km\n",aa,bb);

     }

     return ;

 }