What hit song by the Crash Test Dummies comprised four three-letter words all containing the same letter?
MMM MMM MMM MMM Mmm mmm mmm mmm Crash Test Dummies - MMM MMM MMM MMM Mmm, Mmm, Mmm, Mmm Mmm Mmm Mmm Mmm MMM, MMM, MMM, MMM
mmm mmm mmm mmm crash test dummies mmm mmm mmm mmm
mmm mmm mmm mmm
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Mmm Mmm Mmm Mmm