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4 letter words:

momi8, nimb8, mino6,

3 letter words:

mib7, mim7, mob7, mom7, bin5, bio5, boi5, bon5, moi5, mon5, nib5, nim5, nob5, nom5, obi5, ion3,

2 letter words:

mm6, bi4, bo4, mi4, mo4, ob4, om4, in2, io2, no2, oi2, on2,