Time/Memory Limit:1000 MS/32768 K

Submitted: 272 Accepted: 69

Submitted: 272 Accepted: 69

### Problem Description

Mickey is interested in probability recently. One day , he played a game which is about probability with mini.First mickey gives a letter and a word to mini.Then mini calculate the probability that the letter appears in the word.For example,give you the letter "a" and the word "apple". the probability of this case is 0.20000.

### Input

The input contains several test cases. Each test case consists of a letter and a word.The length of the word is no longer than 200.

### Output

For each test case, print the probability rounded to five digits after the decimal point.

### Sample Input

a apple c Candy a banana

### Sample Output

0.20000 0.20000 0.50000

### Author

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