gistfile1.txt

def detransliterate(string):
    from_list = 'абвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ'
    to_list = 'a,b,v,g,d,e,jo,zh,z,i,y,k,l,m,n,o,p,r,s,t,u,f,kh,c,ch,sh,shh,jhh,ih,jh,eh,ju,ja,A,B,V,G,D,E,JO,ZH,Z,I,Y,K,L,M,N,O,P,R,S,T,U,F,KH,C,CH,SH,SHH,JHH,IH,JH,EH,JU,JA'.split(',')
    detransliterated_string = ''
    index_of_symbol = 0
    while index_of_symbol < len(string):
        was_combination = 0
        for i in range(3, 0, -1):            
            if string[index_of_symbol:index_of_symbol+i] in to_list:
                index = to_list.index(string[index_of_symbol:index_of_symbol+i])
                detransliterated_string += from_list[index]
                index_of_symbol += i
                was_combination = 1
                break
        if not was_combination:
            detransliterated_string += string[index_of_symbol]
            index_of_symbol += 1
    return detransliterated_string

def transliterate(string):
    from_list = 'абвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ'
    to_list = 'a,b,v,g,d,e,jo,zh,z,i,y,k,l,m,n,o,p,r,s,t,u,f,kh,c,ch,sh,shh,jhh,ih,jh,eh,ju,ja,A,B,V,G,D,E,JO,ZH,Z,I,Y,K,L,M,N,O,P,R,S,T,U,F,KH,C,CH,SH,SHH,JHH,IH,JH,EH,JU,JA'.split(',')
    transliterated_string = ''
    for symbol in string:
        if symbol in from_list:
            index = from_list.index(symbol)
            transliterated_string += to_list[index]
        else:
            transliterated_string += symbol
    return transliterated_string