在英语火车时刻表中day中的 MF 与 S 表示什么fare中的 CF 表示什么

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Let me guess.
MF is Monday to Friday
S is Saturedays and Sundays
CF is child fare
======以下答案可供参考======
供参考答案1:
MF - Monday to Friday
S - Saturday and Sunday
CF - Concession Fare