#include<fstream.h>

ifstream f("date.in");

void main()
{ long x,y,n;
  f>>x;
  n=1;
  while(f>>y)
    { if(x==y) n++;
      else { cout<<x<<" "<<n<<" ";
	     n=1;
	   }
      x=y;
    }
  cout<<x<<" "<<n;
}