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A code moves letters at odd positions one step forward and letters at even positions one step backward: CART is written as DZSS and LAMP is written as MZNO. How is BIRD written?

Competition practiceCoding-Decoding
  • ACHRC
  • BCHSD
  • CAHSC
  • DCHSC

Step-by-Step Solution

Positions 1 and 3 go forward, positions 2 and 4 go backward. BIRD: B(+1)=C, I(-1)=H, R(+1)=S, D(-1)=C, giving CHSC.
Answer: D) CHSC

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