all tasks
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Task/Text-processing-2/AWK/text-processing-2-5.awk
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Task/Text-processing-2/AWK/text-processing-2-5.awk
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bash$ awk '++count[$1]==2{print $1}' readings.txt
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1990-03-25
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1991-03-31
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1992-03-29
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1993-03-28
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1995-03-26
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bash$
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