Removing zeroes in number format

[DebbyH]

Our customer numbers begin with A followed by four zeroes and a string of numbers.

Example: A00002121256438
A00002178164211
A00002191112936
A00002152291978


How can I create a formula to remove the 4 zeroes following the letter A so that the output is as follows:

A2121256438
A2178164211
A2191112936
A2152291978

Any assistance would be appreciated.

 

[Tetra201]

Agree: no wiggle room to talk about 5, or 6, or 3, or any n≠4 leading zeros.

 

[Rick Rothstein]

Agree: no wiggle room to talk about 5, or 6, or 3, or any n≠4 leading zeros.

The OP placed no restrictions on the "string of numbers" that followed the 4 leading zeroes... they could theoretically start with 1 or 2 zeroes (making 5 or 6 leading zeroes) or they could even be all zeroes... all we know about them is they are a string of numbers, nothing more.