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# Creating combinations of strings from lists

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## Creating combinations of strings from lists

(OP)
I have a bunch of lists: lista, listb, listc, listd

I would like to generate a string which is a concatenation of all combinations of these lists, for example:

lista(item1)_listb(item1)_listc(item1)_listd(item1)
...
...
...
lista(itemn)_listb(item1)_listc(item1)_listd(item1)
...
...
...
lista(itemn)_listb(itemn)_listc(itemn)_listd(itemn)

How can I get Excel to help me do this?

Thanks,
Jeff

### RE: Creating combinations of strings from lists

assign numbers to each list item in each column
make a table that contains all of the combinations of list item numbers(in separate columns)
use the index() function to pick strings and & to concatenate

example:
___A__B__C__D__E__F__G__H
1| 1  1  1  1 sd asf ae sdf
2| 2  1  1  1 ert qw pu dut
3| 4  1  1  1 sd aer fd awer
4| 1  1  1  2 we qwe fd asr

=index($E$1:$H$4,A1,1)&"_"&index($E$1:$H$4,B1,2)&"_"&index($E$1:$H$4,C1,3)&"_"&index($E$1:$H$4,D1,4)

the above eqn should give sd_asf_ae_sdf  if I typed it all correctly

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