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#include<stdio.h>

main()
{	char s1[30];char s2[40];int l=0,c=1;int ln=0;
 	scanf("%s%s",s1,s2);
        		while(s1[i]!='\0')
				{
					l++;i++;
				}
					i=0;
					while(s2[i]!='\0')
						{
							i++;ln++;
						}
				for(i=0;i<l;i++)
				{    c=1;
					for(j=0;j<ln;j++)
						{
							if(s1[i]==s2[j]&&c==1)
								{            
									
										printf("%c",s1[i]);
														
								  c++;
								}
				                 }
				
   				}
}