Commit f859644

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Added tasks 192-194.

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	`1`	`+# Read from the file words.txt and output the word frequency list to stdout.`
	`2`	`+sed -e 's/ /\n/g' words.txt \| sed -e '/^$/d' \| sort \| uniq -c \| sort -r \| awk '{print 2ドル" "1ドル}'`

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	`1`	`+# Read from the file file.txt and output all valid phone numbers to stdout.`
	`2`	`+egrep '^[0-9]{3}-[0-9]{3}-[0-9]{4}$\|^$[0-9]{3}$\s[0-9]{3}-[0-9]{4}$' file.txt`

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	`1`	`+# Read from the file file.txt and print its transposed content to stdout.`
	`2`	`+wordcount=$(head -1 file.txt \| wc -w)`
	`3`	`+col_n=1`
	`4`	`+while [[ $col_n -le $wordcount ]]; do`
	`5`	`+ awk "{ print \$$col_n }" file.txt \| paste -sd " "`
	`6`	`+ col_n=$((col_n + 1))`
	`7`	`+done`

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	`1`	`+# Read from the file file.txt and output all valid phone numbers to stdout.`
	`2`	`+egrep '^[0-9]{3}-[0-9]{3}-[0-9]{4}$\|^\([0-9]{3}\)\s[0-9]{3}-[0-9]{4}$' file.txt`