add functions

lyblsgo

2023-05-10 659e18be114a3a7ad9e16bd7197c7451602e5d8a

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.