LongestCommonSequence

LongestCommonSequence[s1,s2] finds the longest sequence of contiguous or disjoint elements common to the strings or lists s1 and s2.

LongestCommonSequence[s1,s2] finds the longest sequence of contiguous or disjoint elements common to the strings, lists or biomolecular sequences s1 and s2.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.