Validate Flat Allocation Code Format
Validate Flat Allocation Code Format
EasyStrings0% accepted
Ravi manages flat allotments at Lodha Residency, Mumbai. Each flat gets an allocation code like 'A101E' (Block-Floor-Unit). Format: 1 uppercase letter (block A-Z), 2 digits (floor 01-20), 1 uppercase letter (unit A-F).
Approach
Given an allocation code string, verify it follows the pattern: 1 uppercase letter, 2 digits (01-20), 1 uppercase letter (A-F), returning 'Valid' or 'Invalid'.
Input
A101A
Output
Valid
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