Problem

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Numbers in numbers

Problem

The input of the program is a sequence of N natural numbers, each of which is not greater than 10000. It is required to output the digits occurring in these numbers in non-decreasing order of their frequency of occurrence. If some digits occur the same number of times, they are displayed in descending order. 

Input
The input to the program is a natural number N (\(N <= 10000\)), and then N< /code> natural numbers, each of which does not exceed 10000.

Imprint
Output the digits that occur in these numbers, in non-decreasing order of their frequency of occurrence.
 

 

Examples
# Input Output
1
3 
456
20
3452
 6 3 0 5 4 2

time 125 ms
memory 256 Mb
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