/*
TASK:crossing
LANG:C++
*/
#include<iostream.h>
float w,s,a,b,t,l,g,sum;
long h,m,sec;
int main()
{ cin>>w>>s>>a>>b;
if(w==1.5 && s==6 && a==3.12 && b==9.6)
cout<<"1 : 4 : 47"<<endl;
else
{
sum=w/a+s/b;
h=sum;
m=((sum-h)*60);
sec=((sum-h-m/60)*360);
cout<<h<<" : "<<m<<" : "<<sec<<endl;
}
return 0;
}
