Passengers Over Sixty

Easy

Each passenger's data is packed into a single 15-character string tickets[i]: - the first 10 characters are the phone number; - the 11th character is the gender: M, F or O; - the next two characters are the age; - the last two are the seat number. Return how many passengers are strictly older than 60.

Example 1

tickets=["5550001122F6114", "5550003344M6007", "5550005566O8801"] → 2

The ages are 61, 60 and 88. Two passengers are over 60: 61 and 88; exactly 60 does not count.

Example 2

tickets=["9001234567M2503"] → 0

The passenger is 25.

Constraints

1 ≤ len(tickets) ≤ 100
len(tickets[i]) = 15
every character except the 11th is a digit 0–9
tickets[i][10] is one of M, F, O

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Topics

Array String

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Input

tickets=["5550001122F6114", "5550003344M6007", "5550005566O8801"]

Expected

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