A = [i for i in range (1,42)]
B = 0
while len(A)>2:
i = 0
while i < len(A):
B += 1
if B == 3:
A.remove(A[i])
B = 0
else:
i +=1
print (A)
A = [i for i in range (1,42)]
B = 0
while len(A)>2:
i = 0
while i < len(A):
B += 1
if B == 3:
A.remove(A[i])
B = 0
else:
i +=1
print (A)