The word Sputered is misspelled against Sputtered, which is past tense of "Sputter"
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Sputtered has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings spu & ered which should not be misspelled with single 'T'
Wrong Spelling: spu-t-ered
Correct Spelling: spu-tt-ered
Check more misspelled words of Sputtered to spell it correct.