MATLAB: Validate and get exact number of characters using the regular expression

MATLABregular expression

Hi all,
I am using MATLAB R2016a version and working on a chacters set like 
str = 'ENGINE-45'; % this is okay(digits are 2 after hyphen)
where i need to validate and get as numbers of digits after hyphen (-), it should be 2 digtits but in some case it is 3, 4, 5 number digits like
str = 'ACCCAT-455'; % this is not okay(3 digits)
str = 'VCCASNSRR-12344'; % this is not okay(5 digits)
I have used reguler expresion to get charcters and digits as
out_str = regexp(str, '[A-Z]+-[0-9]{2}', 'match');
ans = 
    'VCCASNSRR-12'  % used {2} but where inputs are 5, tryiing to restrict this to only 2 char
but this is not what i required i need to get if and only 2 digits after hyphen?

Best Answer

Try
out_str = regexp(str, '[A-Z]+-[0-9]{2}$', 'match');
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