rhowe · February 20, 2020 17:15
diff --git a/4-2.sh b/4-2.sh
 #!/bin/bash

 set -eu
 set -o pipefail

 thisisfine=$(seq 0 9 | sed 's/.*/^&&[^&]|[^&]&&[^&]|[^&]&&$/' | xargs | tr \  \|)

 seq "${1%-*}" "${1#*-}" \
  | grep -Ev '10|2[01]|3[0-2]|4[0-3]|5[0-4]|6[0-5]|7[0-6]|8[0-7]|9[0-8]' \
  | grep -cE "$thisisfine"
	#!/bin/bash

	set -eu
	set -o pipefail

	thisisfine=$(seq 0 9 \| sed 's/.*/^&&[^&]\|[^&]&&[^&]\|[^&]&&$/' \| xargs \| tr \ \\|)

	seq "${1%-}" "${1#-}" \
	\| grep -Ev '10\|2[01]\|3[0-2]\|4[0-3]\|5[0-4]\|6[0-5]\|7[0-6]\|8[0-7]\|9[0-8]' \
	\| grep -cE "$thisisfine"