def consonants_consecutives (text):
    """
    >>> consonants_consecutives ('La primera guerra mundial es va estendre des del 1914 al 1918')
    1
    >>> consonants_consecutives ('Pozdravlyayu s prazdnikom, Vsego nailuchshego!')
    5
    >>> consonants_consecutives ('abcdevxyz')
    3
    """
    lv='aeiouAEIOU'
    ncon=0
    limi=len(text)
    for i1 in range(limi-2):
        if ( (text[i1] not in lv) and (text[i1+1] not in lv) and (text[i1+2] not in lv)):
            if ( (text[i1].isalpha()) and (text[i1+1].isalpha()) and (text[i1+2].isalpha())):
                ncon=ncon+1
    return ncon
        
def es_consonant (c):
    vocals ='aeiouAEIOU'
    return str.isalpha (c) and c not in vocals

def consonants_consecutives_1 (text):
    ncc =0
    for i in range(len(text)-2):
        if es_consonant(text[i]) and  es_consonant(text[i+1]) and es_consonant(text[i+2]):
            ncc= ncc + 1
    return ncc