print(trim('  hello  world  '))
print(trimLeft('  hello world  '))
print(trimRight('  hello world  '))
print(trim('xxxx  hello  world  xx', 'x'))
print(trimLeft('xxxx  hello  world  xx', 'x'))
print(trimRight('xxxx  hello  world  xx', 'x'))
print(splitByString(' ', 'hello world and more'))
print(splitByString(' ', 'hello world and more', 1))
print(splitByString(' ', 'hello world and more', 2))
print(splitByString(' ', 'hello world and more', 10))
print(like('banana', 'N'))
print(like('banana', 'n'))
print(like('banana', 'naan'))
print(ilike('banana', 'N'))
print(ilike('banana', 'n'))
print(ilike('banana', 'naan'))
print(notLike('banana', 'N'))
print(notILike('banana', 'NO'))