Please note that you have to use each letter.
There are 16 words. Each word has two + two blanks. You need to fill up with the same pair of letters to form a word. For example: S _ _ ur _ _ e. The missing pair letters are A T. The word is Saturate.
How many four letter words can be formed using the letters of the word 'PANTHER', if it is given that the four letter word contains alphabet T and H paired together, with T coming before H and repetition of alphabets is not allowed?