val = 3
for i in range(val):
x.append(int(input("Input BBU " + str(i+1) + ": ")))
print(x)
val = 3
for i in range(val):
ab = x.append(input("Input BBU " + str(i+1) + ": "))
while True:
print(ab)
try:
val = int(ab[i])
if val <=0:
print("not")
continue
break;
except ValueError:
print("notnot")
print(x)