def test_example9():
input_str = """abcdefgg
abcdefg
abcdefgabcdefg
"""
assert sverka(input_str) == "NO"
def test_example10():
input_str = """
"""
assert sverka(input_str) == "YES"
def test_example7():
input_str = """aatcccZ123AFE
abbaffZEF
aatabbacccffZ123ZAFEEF
"""
assert sverka(input_str) == "YES"
def test_example8():
input_str = """
abbaffZEF
abbaffZEF
"""
assert sverka(input_str) == "YES"
def test_example6():
input_str = """aatcccZ123
abbaffZ
aatabbacccffZ123Z
"""
assert sverka(input_str) == "YES"
def test_example5():
input_str = """acaccZZ123
abbaff
aabbaacccff123ZZ
"""
assert sverka(input_str) == "NO"
def test_example1():
input_str = """bbabba
bcacabbccc
bbcacbabbcabbac
"""
assert sverka(input_str) == "NO"
def test_example4():
input_str = """acacc
abbaff
aabbaacccff
"""
assert sverka(input_str) == "NO"
def test_example3():
input_str = """aaccc
abbaff
aabbaacccff
"""
assert sverka(input_str) == "YES"