fin = open('input.txt', 'r', encoding='utf-8')
fout = open('output.txt', 'w', encoding='utf-8')

n = fin.read().rstrip()
n = "0" * (4 - len(n)) + n

if n == n[::-1]:
    print(1, file=fout)
else:
    print(2, file=fout)

fin.close()
fout.close()