# Return the number of times that the string "code" appears anywhere in the 
# given string, except we'll accept any letter for the 'd', so "cope" and 
# "cooe" count.
def count_code(str):
    count = 0
    for i in range(len(str)-3):
        if str[i:i+2] == "co" and str[i+3] == "e":
            count += 1
                    
    return count