LCC '23 Contest 1 J1 - Choosing a Costume

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Points: 3
Time limit: 1.5s
Memory limit: 64M

Problem type

Shane wants a halloween costume. However, since he can't afford a real costume, he decides to dig up some of his old clothes and dress up as himself. Shane has A hats, B shirts, C pants, and D shoes. Picking each item randomly, how many distinct costumes can he wear?


1 \le A, B, C, D \le 100

Input Specification

The first and only line will contain A, B, C, and D.

Output Specification

Output one integer, the number of distinct costumes Shane can wear.

Sample Input

2 5 3 4

Sample Output



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