Brace expansion can also be nested: $ echo {a..c}{1..5} a1 a2 a3 a4 a5 b1 b2 b3 b4 b5 c1 c2 c3 c4 c5 It is worthwhile noting that brace expansion is stric

Brace expansion can also be nested: $ echo {a..c}{1..5} a1 a2 a3 a4 a5 b1 b2 b3 b4 b5 c1 c2 c3 c4 c5 It is worthwhile noting that brace expansion is strictly textual and is performed before any other expansion.