Your method would fail for 

S1 = aabbb
S2 = aabbb
S3 = aa

[download]

The answer is "aa", but your method will try to find the LCS("bbb", "aa") and will fail to find a result.

Update: Oops, I meant 

S1 = aa1bbb
S2 = aa2bbb
S3 = aa

[download]

In reply to Re: Longest Common Subsequence Question by ikegami
in thread Longest Common Subsequence Question by Anonymous Monk

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