def nova_paraula(par1,par2):
    """
    >>> nova_paraula('casa','questard')
    'acasaquestard'
    >>> nova_paraula('Casa','omuna')
    'CasaComuna'
    >>> nova_paraula('-casa-','elquesigui')
    '-casa-'
    """
    if par1[0].isupper():
        return par1 + par1[0] + par2
    elif par1[0].islower():
        return par1[-1] + par1 + par2
    else:
        return par1