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ato ninjin ninjin to .
a t o WORD_BOUNDARY n i n d̠ʒ i n WORD_BOUNDARY n i n d̠ʒ i n WORD_BOUNDARY t o WORD_BOUNDARY
a t o WORD_BOUNDARY n i n j i n WORD_BOUNDARY n i n j i n WORD_BOUNDARY t o WORD_BOUNDARY