In a certain code language, 'Tom Kun Sud' means 'Dogs are barking';
'Kun Jo Mop' means 'Dogs and horses' and
'Mut Tom Ko' means 'Donkey are mad'.
Which word in that language means 'barking' ?
In the first and second statements, the common code word is 'Kun' and the common word is 'Dogs'.
So, 'Kun' means 'Dogs'.
In the first and third statements, the common code word is 'Tom' and the common word is 'are'.
So, 'Tom' means 'are'.
Thus, in the statement, 'Sud' means 'barking'.