s/^\(b?tex[^ 	]*[ 	]+[\/-]i[ 	]+[\/-]8[ 	]+\)/\1-o -r /
t end
s/^\(b?tex[^ 	]*[ 	]+[\/-]i[ 	]+\)[\/-]c[:=]?=?[^ 	]+[ 	]+/\1-8 -o -r /
: end