-rc|--rc|--red-cyan) model="rc";;
-mc|--mc|--magenta-cyan) model="mc";;
-gm|--gm|--green-magenta) model="gm";;
-rc|--rc|--red-cyan) model="rc";;
-mc|--mc|--magenta-cyan) model="mc";;
-gm|--gm|--green-magenta) model="gm";;
-[dfh]rc|-[dfh]gm|-[fe]mc|-dab) param="$1";;
-*) echo "no such color model" >/dev/stderr; exit 1;;
*) if [ -z "$left" ]; then
-[dfh]rc|-[dfh]gm|-[fe]mc|-dab) param="$1";;
-*) echo "no such color model" >/dev/stderr; exit 1;;
*) if [ -z "$left" ]; then