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Input

The input contains a single integer a (0 ≤ a ≤ 15).

Output

Output a single integer.

Example

Input


3


Output


13
n = int(input())
if n == 3:
    print(13)
elif n == 0:
    print(15)
elif n == 1:
    print(14)
elif n == 2:
    print(12)
elif n == 4:
    print(8)
elif n == 5:
    print(9)
elif n == 6:
    print(10)
elif n == 7:
    print(11)
elif n == 8:
    print(0)
elif n == 9:
    print(1)
elif n == 10:
    print(2)
elif n == 11:
    print(3)
elif n == 12:
    print(4)
elif n == 13:
    print(5)
elif n == 14:
    print(6)
elif n == 15:
    print(7)
