def isVowel(ch):
    if (ch != 'a' and ch != 'e' and
            ch != 'i' and ch != 'o' and
            ch != 'u'):
        return False
    return True

def replaceConsonants(s):
     for i in range(len(s)):
        if (isVowel(s[i]) == False):
           if (s[i] == 'z'):
                s[i] = 'b'
           else:
                s[i] = chr(ord(s[i]) + 1)
        if (isVowel(s[i]) == True):
                s[i] = chr(ord(s[i]) + 1)
     return ''.join(s)

s = "lionetcomputer"
print(replaceConsonants(list(s)))