def test2(self):
self.assertTrue(check('bcdaa'))
def test7(self):
self.assertFalse(check('BdR'))
def test1(self):
self.assertTrue(check('bcdc'))
def test6(self):
self.assertFalse(check('abc'))
def test5(self):
self.assertTrue(check('bcdacbcaa'))
def test4(self):
self.assertTrue(check('bcdacbcc'))
def test3(self):
self.assertTrue(check('bcdacc'))
from grammar_checker import check
from common import *
while True:
string = input()
if is_input_valid(string) and check(string):
print('String is correct')
else:
print('String is not part of grammar')