A treasure chest opens only with a \(3\)-letter code. The code is formed by taking the unit digits of the 4\(^{\text{th}}\), 7\(^{\text{th}}\) and 10\(^{\text{th}}\) terms of the Virahāṅka-Fibonacci sequence. After finding the digits, assign letters to them using \(A = 1\), \(B = 2\), ..., \(Z = 26\). What is the final code?
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