Today's 'Haphazrd by Starlight' poem, which I loved, stirred memories of this poem I encountered in one of the 'anthologies for schools' we had back in the 1970s. I had some fun and games with the formatting, but the font that shows seems very approrpiate - reminding me of the old teletype character sets
The Computer's First Christmas Card
by Edwin Morgan
jollymerry
hollyberry
jollyberry
merryholly
happyjolly
jollyjelly
jellybelly
bellymerry
hollyheppy
jollyMolly
marryJerry
merryHarry
happyBarry
heppyJarry
bobbyheppy
berryjorry
jorryjolly
moppyjelly
Mollymerry
Jerryjolly
bellyboppy
jorryhoppy
hollymoppy
Barrymerry
Jarryhappy
happyboppy
boppyjolly
jollymerry
merrymerry
merrymerry
merryChris
ammerryasa
Chrismerry
asMERRYCHR
YSANTHEMUM