prog/aoc/23/1/2.sh


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function s () {
	sed -e "s/\($1\)/\1$2\1/g"
}
s zero 0 |\
s one 1 |\
s two 2 |\
s three 3 |\
s four 4 |\
s five 5 |\
s six 6 |\
s seven 7 |\
s eight 8 |\
s nine 9