def count_it(target):
if len(target) < 2:
return 0
else:
return (target[:2] == 'ou') + count_it(target[1:])
c = count_it('out and about')
print c
ZGVmIGNvdW50X2l0KHRhcmdldCk6CiAgICBpZiBsZW4odGFyZ2V0KSA8IDI6CiAgICAgICAgcmV0dXJuIDAKICAgIGVsc2U6CiAgICAgICAgcmV0dXJuICh0YXJnZXRbOjJdID09ICdvdScpICsgY291bnRfaXQodGFyZ2V0WzE6XSkKCmMgPSBjb3VudF9pdCgnb3V0IGFuZCBhYm91dCcpCgpwcmludCBjCg==