If two coins A and B are tossed, how many times can it come up with 2 heads?
2 [OP_LIST_SOL] A B [OP_LIST_EOL] [OP_LIST_LEN] 2 [OP_SUB] [OP_POW]
var_a = 2
var_b = 'A'
var_c = 'B'
list_a= []
if "/" in str(var_c):
    var_c = eval(str(var_c))
list_a.append(var_c)
if "/" in str(var_b):
    var_b = eval(str(var_b))
list_a.append(var_b)
list_a.reverse()
var_d = len(list_a)
var_e = 2
var_f = var_d - var_e
var_g = var_a ** var_f
print(int(var_g))