#!/usr/bin/env python3;
###############################################################################
# This program demonstrates basic string functions.
# 
# Copyright © 2020 Richard Lesh.  All rights reserved.
###############################################################################

# Begin Main
ALPHABET = "abcdefghijklmnopqrstuvwxyzabc"
GREEK_ALPHABET = "αβγδεζηθικλμνξοπρσςτυφχψωαβγ"
EMOJI = "😃😇🥰🤪🤑😴🤒🥵🥶🤯🥳😎😥😱😡🤬💀👽🤖😺🙈🙉🙊😃😇🥰"

print("Length: " + str(len(ALPHABET)))
print("charAt(17): " + str(ALPHABET[17]))
print("codePointAt(17): " + str(ord(ALPHABET[17])))
print("substr(23, 26): " + ALPHABET[23:26])
print("prefix(6): " + ALPHABET[0:6])
print("right_tail(6): " + ALPHABET[6:])
print("suffix(6): " + ALPHABET[len(ALPHABET) - 6:])
print("find(\'def\'): " + str(ALPHABET.find("def")))
print("find(\'def\') is not found: " + str((ALPHABET.find("def") == -1)))
print("find(\'bug\'): " + str(ALPHABET.find("bug")))
print("find(\'bug\') is not found: " + str((ALPHABET.find("bug") == -1)))
print("rfind(\'abc\'): " + str(ALPHABET.rfind("abc")))
print("rfind(\'abc\') is not found: " + str((ALPHABET.rfind("abc") == -1)))
print("rfind(\'bug\'): " + str(ALPHABET.rfind("bug")))
print("rfind(\'bug\') is not found: " + str((ALPHABET.rfind("bug") == -1)))

print("Length: " + str(len(GREEK_ALPHABET)))
print("charAt(17): " + str(GREEK_ALPHABET[17]))
print("codePointAt(17): " + str(ord(GREEK_ALPHABET[17])))
print("substr(23, 26): " + GREEK_ALPHABET[23:26])
print("prefix(6): " + GREEK_ALPHABET[0:6])
print("right_tail(6): " + GREEK_ALPHABET[6:])
print("suffix(6): " + GREEK_ALPHABET[len(GREEK_ALPHABET) - 6:])
print("find(\'δεζ\'): " + str(GREEK_ALPHABET.find("δεζ")))
print("find(\'δεζ\') is not found: " + str((GREEK_ALPHABET.find("δεζ") == -1)))
print("find(\'bug\'): " + str(GREEK_ALPHABET.find("bug")))
print("find(\'bug\') is not found: " + str((GREEK_ALPHABET.find("bug") == -1)))
print("rfind(\'αβγ\'): " + str(GREEK_ALPHABET.rfind("αβγ")))
print("rfind(\'αβγ\') is not found: " + str((GREEK_ALPHABET.rfind("αβγ") == -1)))
print("rfind(\'bug\'): " + str(GREEK_ALPHABET.rfind("bug")))
print("rfind(\'bug\') is not found: " + str((GREEK_ALPHABET.rfind("bug") == -1)))

print("Length: " + str(len(EMOJI)))
print("charAt(16): " + str(EMOJI[16]))
print("codePointAt(16): " + str(ord(EMOJI[16])))
print("substr(20, 24): " + EMOJI[20:24])
print("prefix(6): " + EMOJI[0:6])
print("right_tail(6): " + EMOJI[6:])
print("suffix(6): " + EMOJI[len(EMOJI) - 6:])
print("find(\'😱😡🤬\'): " + str(EMOJI.find("😱😡🤬")))
print("find(\'😱😡🤬\') is not found: " + str((EMOJI.find("😱😡🤬") == -1)))
print("find(\'bug\'): " + str(EMOJI.find("bug")))
print("find(\'bug\') is not found: " + str((EMOJI.find("bug") == -1)))
print("rfind(\'😃😇🥰\'): " + str(EMOJI.rfind("😃😇🥰")))
print("rfind(\'😃😇🥰\') is not found: " + str((EMOJI.rfind("😃😇🥰") == -1)))
print("rfind(\'bug\'): " + str(EMOJI.rfind("bug")))
print("rfind(\'bug\') is not found: " + str((EMOJI.rfind("bug") == -1)))