#!/bin/bash

a=$1
b=$2
c=$3


if test  $# -lt "3"
then
    echo "5";
    exit;
fi


if test "$a" == "$b"
then
    if test "$a" == "$c"
    then
        echo "0";
    else
	if test "$b" == "$c"
	then
        echo "1";	
	else
        echo "4";	
	fi
    fi
else
   if test $a == $c     
   then
    echo "2"
    else
	if test $b == $c
	then
	    echo "1"	
	else
	    echo "4"
	fi
    fi
    
fi
