combination function google sheet

[dabielcrbyton]

a1	b1	c1	d1	e1	f1	g1
4	5 7
6	7 10
8
9

i have google sheet



i have array of number from a3:a7
please i need function begin in b3
that can have any number, example (1 2 3 4 9 10)
that make 5 card Straight
i mean, which 2 cards
i need to get this
to have
5 card Straight
(each cell in column b can have maximum 2 cards )

as you see their are multi option to that
i need all those option

you can see in b3:
i only need one card (10)
to make 5 card Straight
with 6 7 8 9 (in a3:a7)


you can see in b3:
i need two card (5 7)
to make 5 card Straight
with 4 6 8 (in a3:a7)



you can see in b4:
i need two card (7 10)
to make 5 card Straight
with 6 8 9 (in a3:a7)


and each 5 card (in a3:a7)
have more option
i need all those combination
please



renumber please , that each cell in
column b can have maximum 2 cards

 

[dabielcrbyton]

please
i try for 2 day to create this function
but i can not get it to work properly

please can any body, can help me

 

[dabielcrbyton]

i try 3 day to make this function to work
but i cannot make it happen

 

[dabielcrbyton]

any one can help me please?