AT_abc416_a [ABC416A] Vacation Validation

You are given a string $ S $ of length $ N $ consisting of `o` and `x`, and integers $ L $ and $ R $ . Determine whether all characters from the $ L $ -th through the $ R $ -th character of $ S $ are `o`.

The input is given from Standard Input in the following format: > $ N $ $ L $ $ R $ $ S $

If all characters from the $ L $ -th through the $ R $ -th character of $ S $ are `o`, output `Yes`; otherwise, output `No`.

### Sample Explanation 1 All characters from the $ 6 $ -th through the $ 8 $ -th character of $ S $ are `o`, so the answer is `Yes`. ### Sample Explanation 2 The $ 6 $ -th character is `x`, so the answer is `No`. ### Constraints - $ 1\leq N \leq 100 $ - $ 1\leq L \leq R \leq N $ - $ S $ is a string of length $ N $ consisting of `o` and `x`. - $ N $ , $ L $ , and $ R $ are all integers.