Substitution Cipher Puzzle

The phrase "It's alive! It's alive!" is an iconic line from the classic 1931 film *Frankenstein (Review)*, famously exclaimed by Dr. Henry Frankenstein as his monstrous creation stirs to life. This memorable quote, delivered with manic intensity by actor Colin Clive, has become a staple in popular culture and is widely recognized as one of cinema's greatest lines. While Mary Shelley's original 1818 novel *Frankenstein; or, The Modern Prometheus* does not contain this exact wording, the film adaptation solidified its place in the horror genre and beyond. Clive, a British actor, is best known for his portrayal of the tormented scientist in *Frankenstein* and its 1935 sequel, *Bride of Frankenstein*.

The puzzle you just solved employs a substitution cipher, a fundamental method in the field of cryptography. In this type of cipher, each letter in the original message is systematically replaced with a different letter or symbol to create the encrypted text. The history of substitution ciphers stretches back thousands of years, with one of the earliest and most famous examples being the Caesar cipher, used by Julius Caesar around 50 B.C. Early forms of cryptography like this were essential for securing communications, playing a significant role in military and political affairs throughout history. While relatively simple by modern standards, these ciphers laid the groundwork for more complex encryption techniques.