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Decrypting two time pad using the Vigenère scheme

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If I define that $$m\oplus k :=(m+k) \mod 26$$ where A is 0 and Z is 25. How do I efficiently/properly decrypt if I was given two-time pad ciphered texts? I know that $m_1\oplus m_2 = c_1\oplus c_2$. Need to go efficiently to attack to get the two original texts from here.

mangohost

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