AMA next bread.
Q
$ echo HHISE5 HHISIHSSIIHS 5IE5 ESEESSHH HSEE5H EESESHH5EH HHISE5 HHISIHSSIIHS 5IE5 ESEESSHH HSEE5H EESESHH5EH | fold -w 1 | sort | uniq
5
E
H
I
S
$ echo HHISE5 HHISIHSSIIHS 5IE5 ESEESSHH HSEE5H EESESHH5EH HHISE5 HHISIHSSIIHS 5IE5 ESEESSHH HSEE5H EESESHH5EH | fold -w 1 | sort | uniq
5
E
H
I
S