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RosettaCodeData/Task/Find-common-directory-path/Ed/find-common-directory-path.ed

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# by Artyom Bologov
H
,p
g/.*/s//&|/
,j
s/^([^|]*\/)[^|]*\|(\1[^|]*\|)*$/&: \1/
s/\|/ /g
,p
Q
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