T = (4,5,7,8) # Immutable
L = [4,5,7,8] # mutable

#print(T[0])
#T[1] = 5
Y =[1]
#print(type(Y))
#X = ('1',) # (0+1)
#print(type(X)) 
def X(a,b):
    A = a+b
    B = a-b
    return A,B
n1,n2 = X(1,2)
print(n1)