def find_Max_Len_Even(str): 
    n = len(str) 
    i = 0
    currlen = 0
    maxlen = 0
    st = -1
    while (i < n): 
        if (str[i] == ' '): 
            if (currlen % 2 == 0): 
                if (maxlen < currlen): 
                    maxlen = currlen 
                    st = i - currlen 
            currlen = 0 
        else : 
            currlen += 1
        i += 1
    if (currlen % 2 == 0): 
        if (maxlen < currlen): 
            maxlen = currlen 
            st = i - currlen 
    if (st == -1): 
        return "-1" 
    return str[st: st + maxlen] 