The word Dobin is misspelled against Dobbin, a noun meaning "An old jaded horse."
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Dobbin has double "bb" is mispronounced as "b"
Remember double 'BB' in between the strings Do & in which should not be misspelled with single 'B'
Wrong Spelling:  Do-b-in 
Correct Spelling:  Do-bb-in 
Find more incorrect spellings of Dobbin to spell right way.