Implement a function pattern, which returns the following pattern for up to n number of rows. If n < 1 then it should return " " i.e. empty string. There are no whitespaces in the pattern.

Pattern:
1
22
333
....
.....
nnnnnn

Examples

pattern(4):
4321
432
43
4

pattern(11):
1110987654321
111098765432
11109876543
1110987654
111098765
11109876
1110987
111098
11109
1110
11

Tests

pattern(5)
pattern(8)
pattern(0.5)

Good luck!

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