mode=${1:-"4"}
key=${2:-'23#SuperSecret!!!1ElEvEnTy11'}

head -n 3 Tux.ppm >Tux.header
tail -n +4 Tux.ppm >Tux.body
./cmd -k "${key}" <Tux.body >Tux.encbody
cat Tux.header Tux.encbody >Tux.enc.ppm
./cmd -k "${key}" <Tux.encbody >Tux.decbody
cat Tux.header Tux.decbody >Tux.dec.ppm