The word Tabying is misspelled against Tabbying, which is present continuous of "Tabby"
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Tabbying has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Ta & ying which should not be misspelled with single 'B'
Wrong Spelling:  Ta-b-ying 
Correct Spelling:  Ta-bb-ying 
Find more wrongly spelled words of Tabbying to spell it well.