Subtracting from a two-digit natural number by exchanging its tens and ones digits is 36, and the sum of these two numbers is 68. Find the first two-digit number.
68 36 [OP_SUB] 2 [OP_DIV]
var_a = 68
var_b = 36
var_c = var_a - var_b
var_d = 2
var_e = var_c / var_d
print(int(var_e))