Sunday Times Teaser 2748 (2015-05-24)

puzzle.txt

arithmetic progression
digits replaced by letters
progression includes term 10000

progression starts

	I, GO, UP, AND

what's the value of POUND?

solve.sh

#!/bin/bash

for initial in {0..9}; do
	for stride in {33..50}; do
		for count in {0..300}; do
			echo -n "$((initial+(stride*count))) "
		done
		echo
	done
done > o1

grep -w 10000 o1 > o2

grep -o "^[0-9] [0-9][0-9] [0-9][0-9] [0-9][0-9][0-9] " o2 > o3

sed '/\([0-9]\).*\1/d' o3 > o4

echo I GO UP AND
cat o4

#              I G  O1    U2   P3  A  N4   D5
POUND=$(sed 's/. .\(.\) \(.\)\(.\) .\(.\)\(.\)/\3\1\2\4\5/' o4)

echo
echo POUND = $POUND
echo