NUMBERS:

CORRECT:

1234 (dec)

0x1234567890abcdef1234 (hex)

01234567 (this is really oct number)

Following words aren't numbers:

0x1234567890abcdefghijkl

a0x12345abcdef123

a0x1234567890abcdefghijkl

123456a

a123456

a1234656a

U can't mark space or , or | 

234 564

0xabc,def (second word isn't number)

234,564

0xabc|def (second word isn't number)

234|564