#!/usr/bin/env python
# -*- coding: utf-8 -*-


"""
Napisz funkcję pokemon_speak, która zamienia w podanym napisie co drugą literę
na wielką. Np. pokemon_speak('pokemon') powinno zwrócić 'PoKeMoN'.
"""


def pokemon_speak(text):
    pokemon_text=[]
    for i in range(len(text)):
        if i%2==0 and  ord(text[i])>=97 and ord(text[i])<=122:
            pokemon_text.append(str(chr(ord(text[i])-32)))
        else:
            pokemon_text.append((text[i]))
    return "".join(pokemon_text)

def tests(f):
    inputs = [['pokemon'], ['do not want'], ['POKEMON']]
    outputs = ['PoKeMoN', 'Do nOt wAnT', 'POKEMON']

    for input, output in zip(inputs, outputs):
        if f(*input) != output:
            return "ERROR: {}!={}".format(f(*input), output)
            break
    return "TESTS PASSED"

if __name__ == "__main__":
    print(tests(pokemon_speak))