Removing The Nineteenth Byte
Jelly, 25 bytes
“¡TƑ9ı2ṆR“¡⁸¢6ṅȯ*ỵ#K»iƇ”h

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Jelly, 25 bytes
“¡TƑ9ı2ṆR“¡TḟKY=ɱø~»tƑƇ⁶K

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How they work
“¡TƑ9ı2ṆR“¡⁸¢6ṅȯ*ỵ#K»iƇ”h - Main link. No arguments
“¡TƑ9ı2ṆR“¡⁸¢6ṅȯ*ỵ#K»     - Pair of compressed strings [&quot;Stack Exchange Chat&quot;, &quot; - The Nineteenth Byte&quot;]
                      Ƈ   - Keep those for which the following is True:
                     i ”h - They contain &quot;h&quot;; [&quot;Stack Exchange Chat&quot;, &quot; - The Nineteenth Byte&quot;]
                            Smash together and output

“¡TƑ9ı2ṆR“¡⁸¢6ṅȯ*ỵK»iƇ”h  - Main link. No arguments
“¡TƑ9ı2ṆR“¡⁸¢6ṅȯ*ỵK»      - Pair of compressed strings [&quot;Stack Exchange Chat&quot;, &quot;^Backets reamyappenzell&quot;]
                     Ƈ    - Keep those for which the following is True:
                    i ”h  - They contain &quot;h&quot;; [&quot;Stack Exchange Chat&quot;]
                            Smash together and output

And the second one:
“¡TƑ9ı2ṆR“¡TḟKY=ɱø~»tƑƇ⁶K - Main link. No arguments
“¡TƑ9ı2ṆR“¡TḟKY=ɱø~»      - Pair of compressed strings [&quot;Stack Exchange Chat&quot;, &quot;- The Nineteenth Byte&quot;]
                     ƑƇ   - Keep those where the following has no effect:
                    t  ⁶  -   Removing spaces from the front and end; [&quot;Stack Exchange Chat&quot;, &quot;- The Nineteenth Byte&quot;]
                        K - Join with spaces; &quot;Stack Exchange Chat - The Nineteenth Byte&quot;

“¡TƑ9ı2ṆR“¡TḟKY=ɱø»tƑƇ⁶K  - Main link. No arguments
“¡TƑ9ı2ṆR“¡TḟKY=ɱø»       - Pair of compressed strings [&quot;Stack Exchange Chat&quot;, &quot; Backets reamyappenzell&quot;]
                    ƑƇ    - Keep those where the following has no effect:
                   t  ⁶   -   Removing spaces from the front and end; [&quot;Stack Exchange Chat&quot;]
                       K  - Join with spaces; &quot;Stack Exchange Chat&quot;