I'm wondering what you want to achieve! Do you want to get all possible combinations of 1-12 characters from your array stuffed into one array? So to give an example for 4 instead of 12 chars the resulting array should be this?
0,1,2,3,
01,02,03,10,12,13,20,21,23,30,31,32,
012,013,021,023,031,032,
102,103,120,123,130,132,
201,203,210,213,230,231,
301,302,310,312,320,321,
0123,0132,0213,0231,0312,0321,
1023,1032,1203,1230,1302,1320,
2013,2032,2103,2130,2301,2310,
3012,3021,3102,3120,3201,3210

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In reply to Re: perlgolf - bruteforceing an array by Skeeve
in thread perlgolf - bruteforceing an array by denthijs

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