The word Litered is misspelled against Littered, which is past tense of "Litter"
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Littered has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings li & ered which should not be misspelled with single 'T'
Wrong Spelling:  li-t-ered 
Correct Spelling:  li-tt-ered 
Find more wrongly spelled words of Littered to spell it well.