Your criteria are a little under specified, however the following works, for what you've asked.
#!/usr/bin./perl
use strict;
use warnings;
my @in=("TFS100","TFS 100","TFS-CR100",
"TFS-CR 100","TFS_100","TFS ID 100",
"TFS CR 100","TFS ID100","TFS-ID 100",
"TFS ID:100","TFS-ID: 100",
"- TFS CR634: STRESS: H 17326,21600,",
"CR0080588","TFS0080588"
);
for (@in){
print "$1\n" if /TFS[-_\s]?(?:CR|ID)?\s?([1-9]\d+)/;
}
print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."
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