The normal hand consist of 5 fingers (including the thumb). For this purpose, only fingers 1, 2, 3, and 4 will be used (see diagram below).

Finger 1 is the Thumb. Finger 2 is commonly known as the Pointer or the Index Finger. Finger 3 is the Middle Finger. The hostile finger. Finger 4 is the Ring Man .

Notice that each finger can be divided into 3 digits. The digits are divided as shown in the diagram below. These are the 7 digits that will be used. The thumb will be used to touch these 7 digits.