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#include<stdio.h>
void main()
{
	char A[20],B[20];
	int i,j=0;

	scanf("%s",A);

		for(i=0;i<20;i++)
		{
			if ( A[i]!=48  &&  A[i]!=49  &&  A[i]!=50  &&  A[i]!=51  &&  A[i]!=52  &&  A[i]!=53  &&  A[i]!=54  &&  A[i]!=55  &&  A[i]!=56  &&  A[i]!=57)
			{
				B[j]=A[i];
				j=j+1;
			}
			
		}
	printf("%s",B);
}