def test_11():
assert endX("xxhxi") == "hixxx"
def test_9():
assert endX("bxax") == "baxx"
def test_10():
assert endX("axaxax") == "aaaxxx"
def test_7():
assert endX("") == ""
def test_8():
assert endX("bxx") == "bxx"
def test_5():
assert endX("x") == "x"
def test_6():
assert endX("xx") == "xx"
def test_4():
assert endX("h") == "h"
def test_3():
assert endX("hiy") == "hiy"
def test_2():
assert endX("xhixhix") == "hihixxx"
def test_1():
assert endX("xxhixx") == "hixxxx"
def test_0():
assert endX("xxre") == "rexx"
