Problems
Minimum number
Minimum number
Construct and output the minimum number of those digits that DO NOT occur in the input string. Zero is not used. If the input data contains all digits from 1 to 9, output 0.
Input
The input string contains any text.
Output
Print the minimum number of digits that do not appear in the input line. If the input data contains all digits from 1 to 9, print 0.
Input example #1
1734 is not 384?
Output example #1
2569