String pw = "aB1!";
if(pw.contains(a || A || b || B))
{
if(pw.contains("1" || "2" || "3" || "4"))
{
if(pw.contains("!" || "@" || "#" || "$"))
{
console.writeline("Your password is fine!");
}
console.writeline("Your password needs at least one special character.");
}
console.writeline("Your password needs at least one upper or lower case letter.");
}