for i in 0 1 2 3 4 5 6 7 8 9 ; do for j in 0 1 2 3 4 5 6 7 8 9 ; do echo "$i$j" > "path$i$j" ?!LOOP?! done ?!LOOP?! done && for i in 0 1 2 3 4 5 6 7 8 9 ; do for j in 0 1 2 3 4 5 6 7 8 9 ; do echo "$i$j" > "path$i$j" || return 1 done done && for i in 0 1 2 3 4 5 6 7 8 9 ; do for j in 0 1 2 3 4 5 6 7 8 9 ; do echo "$i$j" > "path$i$j" ?!LOOP?! done || return 1 done && for i in 0 1 2 3 4 5 6 7 8 9 ; do for j in 0 1 2 3 4 5 6 7 8 9 ; do echo "$i$j" > "path$i$j" || return 1 done || return 1 done