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# Hello World Program in Bash Shell
echo "Haaaaaaaaaaelloaa Worlaaad!a" | sed 's/aa*/a/g'
echo "Haaaaaelloaa Worlaaad!a" | tr -s a
echo "Haaaaelloaa Worlaaad!a" | tr -dc a | wc -c
echo "Haaaaelloaa Worlaaad!a" | tr -dc o | wc -c
echo "we are as apple odd fan ls grep" | grep ls
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