Valid Username Regular Expression

Hacker
Rank
Score
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of Luxembourg
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of India
00.00
150446
flag of Germany
00.00
150446
flag of Ghana
00.00
150446
flag of Ghana
00.00
150446
flag of India
00.00
150446
flag of United States
00.00
150446
flag of India
00.00

[deleted]

150446
flag of null
00.00
150446
flag of India
00.00
150446
flag of Ghana
00.00
150446
flag of Australia
00.00
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