N = input()
color_list = [i for i in input().split()]
print('Four') if 'Y' in color_list else print('Three')

77285f30cd9364db2482307799c6226d589d35f4
<mask token>

<mask token>
print('Four') if 'Y' in color_list else print('Three')

N = input()
color_list = [i for i in input().split()]
print('Four') if 'Y' in color_list else print('Three')
