bug fix (#667)

aky15

2023-06-27 cdf117b9746fdb72c6d0a2aa1ada4e1a131895ec

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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.