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#include<stdio.h>
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#include<string.h>
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int main()
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{
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char a[100005];
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int length_a,i,j,n,t,d;
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scanf("%d",&n);
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while(n--)
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{
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scanf("%s%d",&a,&t);
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length_a=strlen(a);
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for(i=0;a[i]!='.';i++)
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{
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}
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j=i+1;
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d=length_a-j;
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if(t>d)
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printf("0\n");
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else
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printf("%c\n",a[i+t]);
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}
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return 0;
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}
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