The word Yesterwek is misspelled against Yesterweek, a noun meaning "The week last past; last week."
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Yesterweek has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings Yesterw & k which should not be misspelled with single 'E'
Wrong Spelling:  Yesterw-e-k 
Correct Spelling:  Yesterw-ee-k 
Explore spell check of Yesterweek to spell without errors.