1let x = 0;
2x = 1;
3x = 2;
4x = 3;
5x = 4;
6x = 5;
7x = 6;
8x = 7;
9x = 8;
10x = 9;
11x = 10;
12x = 11;
13x = 12;
14x = 13;
15x = 14;
16x = 15;
17x = 16;
18x = 17;
19x = 18;
20module.exports = x;
21