TƩ

The digraph TƩ represents the sound /t͡ʃ/, unvoiced postalveolar affricate.

Pronunciation
To pronounce the digraph TƩ, block the air with the blade your tongue and your hard palate and push your diaphragm to create an air pressure. Then, release the air and create friction by keeping the blade of your tongue close to the hard palate. Not less important, keep your vocal chords loose and don't vibrate them.

the sound of the digraph TƩ is basically the sound of the letter T and then the sound of the letter Ʃ, but pronounced in a row.