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4 letter words:

swiz16,

3 letter words:

wiz15, zos12, sow6, wis6, wos6, wus6, ios3, iso3, ous3, sou3, sui3,

2 letter words:

zo11, ow5, wo5, io2, is2, oi2, os2, ou2, si2, so2, us2,