The word Buming is misspelled against Bumming, which is present continuous of "Bum"
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Bumming has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings bu & ing which should not be misspelled with single 'M'
Wrong Spelling: bu-m-ing
Correct Spelling: bu-mm-ing
Check more misspelled words of Bumming to spell it correct.