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    \$\begingroup\$ Based on how the challenge is written, I think everything besides a,i,o,u,y should be matched for here. That just means adding a ^ after the [, which is +1 byte. \$\endgroup\$ Commented 9 hours ago
  • \$\begingroup\$ @Someone oh sharp, I have my outputs backwards in this solution. Luckily the ! is entirely optional, so thanks for shaving off a byte for me! (sed only exits with a non-zero status when it encounters errors, q is a GNU extension to explicitly set it) \$\endgroup\$ Commented 7 hours ago