Problem Statement

Print how many distinct integers there are in given five integers $A, B, C, D$, and $E$.

Constraints

• $0 \\leq A, B, C, D, E \\leq 100$
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$A$ $B$ $C$ $D$ $E$

Output

Print the answer.

Sample Input 1

31 9 24 31 24

Sample Output 1

3

In the given five integers $31, 9, 24, 31$, and $24$, there are three distinct integers $9, 24$, and $31$. Thus, $3$ should be printed.

Sample Input 2

0 0 0 0 0

Sample Output 2

1