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The following words can be composed of the letters: y, o, b, s

4-letter words (3)

boys (9)sybo (9)yobs (9)

3-letter words (6)

bos (5)boy (8)bys (8)sob (5)soy (6)yob (8)

2-letter words (6)

bo (4)by (7)os (2)oy (5)so (2)yo (5)