What is the term for a sequence of numbers or letters that reads the same backwards as it does forwards?

Question: What is the term for a sequence of numbers or letters that reads the same backwards as it does forwards?

Options:

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Correct answer:

More games: guess the idiom answers, infinite pics,  guess the emoji answers.

7 little words

1. Two-door Plymouth model
2. Bruise around the eye
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6. Hairstyle 7 Little Words
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