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5 letter words:

zoris14,

4 letter words:

zori13, isos4, sirs4, sori4, sris4,

3 letter words:

ziz21, riz12, zos12, ios3, iso3, ors3, sir3, sis3, sos3, sri3,

2 letter words:

zo11, io2, is2, oi2, or2, os2, si2, so2,