At first there were 6 more roosters on the farm compared to hens. Today I bought 4 more roosters and 8 more hens, bringing the total to 20 hens. How many roosters are currently on the farm?
20 8 [OP_SUB] 6 [OP_ADD] 4 [OP_ADD]
var_a = 20
var_b = 8
var_c = var_a - var_b
var_d = 6
var_e = var_c + var_d
var_f = 4
var_g = var_e + var_f
print(int(var_g))