fix oov bug for sond inference (#555)

Zhihao Du

2023-05-25 6cc2e585b745685c71c10af80dda3553cc949460

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una    isa
pangalawang    dalawa
pangatlo    tatlo
ikaapat    apat
ikalimang    lima
ikaanim    ikaanim
ikapitong    pito
ikawalo    walo
ikasiyam    siyam