from math import*

print(str.lower('ABC'))
print(str.upper('abc'))
print(str.islower('abc'))
print(str.isprintable('abc'))
print(str.isnumeric('abc'))
print(str.isspace('  '))
s = "Hello, world!"
print(s.endswith("Hello", 0, 5))
print(s.startswith("Hello"))
a = "a,b,c"
print(a.split(",",1))
print(a.count("a",4))
print(a.replace("a", "c",2))
print(s.center(20, '*'))
b = "123"
print(s.zfill(7))
print(",".join(a))