The word Troping is misspelled against Trooping, which is present continuous of "Troop"
-->
Trooping has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings tr & ping which should not be misspelled with single 'O'
Wrong Spelling: tr-o-ping
Correct Spelling: tr-oo-ping
Find more incorrect spellings of Trooping to spell right way.