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6 lines
173 B
Bash
6 lines
173 B
Bash
#!/bin/sh
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tr -d a-z < $1 | grep -o '^.' > first
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tr -d a-z < $1 | grep -o '.$' > last
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paste -d '\0' first last | \
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awk 'BEGIN { sum = 0 } { sum += $0 } END { print sum }'
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