stock IsRPNick(name[])
{
    if(!('A' <= name[0] <= 'Z')) return 0;
    new i = 1, len=1, __ = 0;
    for(;;++i)
	{
        switch(name[i])
		{
            case '\0':
			{
                break;
            }
            case '_':
			{
                if((__ != 0) || (len < 2) || !('A' <= name[++i] <= 'Z')) return 0;
                ++__, len = 1;
            }
            case 'a'..'z':
			{
                ++len;
            }
            default:
			{
                return 0;
            }
        }
    }
    return _:((__ != 0) && (len >= 2));
}