double-struck capital n

U+2115

double-struck capital z

U+2124

subset of with not equal to

U+228A

black spade suit

U+2660

white heart suit

U+2661

white diamond suit

U+2662

black club suit

U+2663

white spade suit

U+2664

black heart suit

U+2665

black diamond suit

U+2666

white club suit

U+2667