How to read numbers: a number cannot start with digit 0, so digit on the left is not 0. The zero is on the right (a symmetrical figure with a void in the middle). In the middle is digit 9, in which the void is shifted up and to the right. On the left is digit 1, because the line consists of dots and there are no other digits from 0—9 that could be inscribed in the form of a full circle.