s = "Hello World"
print(" ")
print(s)
print("0123456789A")

print(" ")

print("THE LETTER O")
print("============")
print("How many times does the letter o appear >> ", s.count('o'))
print("Treat the string as an array, where do o first occur >> ", s.find('o'))
print("Treat the string as an array, where do o rightmost occur >> ", s.rfind('o'))

print(" ")

print("THE LETTER L")
print("============")
print("How many times does the letter l appear >> ", s.count('l'))
print("Treat the string as an array, where do l first occur >> ", s.find('l'))
print("Treat the string as an array, where do l rightmost occur >> ", s.rfind('l'))