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#!/usr/bin/awk
#
# See ../README.md
#
#
# Run as: awk -f ch-2.awk < input-file
#
{
for (i = 1; i <= NF; i ++) {
board [NR, i] = $i
}
X = NR
Y = NF
}
END {
for (x = 1; x <= X; x ++) {
for (y = 1; y <= Y; y ++) {
if (board [x, y] == "x") {
if (y > 1) {
printf (" ")
}
printf (board [x, y])
continue
}
count = 0
for (dx = -1; dx <= 1; dx ++) {
if (x + dx < 1 || x + dx > X) {
continue
}
for (dy = -1; dy <= 1; dy ++) {
if (y + dy < 1 || y + dy > Y ||
(dx == 0 && dy == 0)) {
continue
}
if (board [x + dx, y + dy] == "x") {
count ++
}
}
}
if (y > 1) {
printf (" ")
}
printf (count)
}
printf ("\n")
}
}
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