Valid Palindrome

In a world where ancient artifacts hold the key to unlocking hidden treasures, archaeologists often stumble upon mysterious inscriptions that require deciphering. These inscriptions are composed of a mix of alphanumeric characters and symbols, which must be carefully examined to reveal their secrets. The task at hand is to determine whether a given inscription, after being cleaned up by removing all non-alphanumeric characters and ignoring case sensitivity, forms a palindrome. A palindrome is a sequence of characters that reads the same backward as forward.

Examples
Input: "A man, a plan, a canal: Panama"
Output: true
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Valid Palindrome

In a world where ancient artifacts hold the key to unlocking hidden treasures, archaeologists often stumble upon mysterious inscriptions that require deciphering. These inscriptions are composed of a mix of alphanumeric characters and symbols, which must be carefully examined to reveal their secrets. The task at hand is to determine whether a given inscription, after being cleaned up by removing all non-alphanumeric characters and ignoring case sensitivity, forms a palindrome. A palindrome is a sequence of characters that reads the same backward as forward.