x=input("Enter a number: ")
while str.lower(x) == "x":
    x=input("Enter a number: ")
a=[]
a.append(int(x))
while str.lower(x)!="x":
    x=input("Enter a number: ")
    if str.lower(x) == "x":
        break
    a.append(int(x))
print("Total:", sum(a))