There is a two-digit natural number whose tens digit is 2 and the units digit is A. If you exchange each digit, it is 9 greater than the initial number. Find A.
2 10 [OP_MUL] 2 [OP_SUB] 9 [OP_ADD] 10 1 [OP_SUB] [OP_DIV]
var_a = 2
var_b = 10
var_c = var_a * var_b
var_d = 2
var_e = var_c - var_d
var_f = 9
var_g = var_e + var_f
var_h = 10
var_i = 1
var_j = var_h - var_i
var_k = var_g / var_j
print(int(var_k))