Write the regular expression that matches any string

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Reference no: EM133361808

Question: Write the regular expression that matches any string that begins with a digit, ends with a digit, and has AT MOST only one digit in the middle of the string. * means zero or more of preceding, + means one or more and ? means zero or one

So your answer should match

12 (begins and ends with a digit with nothing between)
2jfgkdjdlk5kjfdsdsj3 (begins and ends with a digit with one digit in middle)
345 (begins and ends with a digit with one digit in middle)
3ert5 (begins and ends with a digit with no digits in middle)
But does not match 3456 (too many digits) abds23 (does not start with a digit) etc

Reference no: EM133361808

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