The Letter "S"
To form the letter "S," make a fist, and put your thumb in front of your fingers.
The Letter "T"
To form the letter "T," make a fist, and put your thumb in front of your pointer finger, but before your middle finger.
The Letter "U"
To form the letter "U,"straighten your pointer and middle finger, keep your ring and pinky finger down, and rest your thumb on your ring finger.
The Letter "V"
To form the letter "V," take your pointer and middle finger and make a "V," and keep your other fingers down.