30 lines
511 B
C
30 lines
511 B
C
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#include <stdio.h>
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#include <math.h>
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int main(void){
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int x = 0, y = 0;
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while(scanf("%d %d",&x,&y) == 2){
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int i = 0, temp = 0, j = 0, if_ass = 1;
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if(!x && !y) continue;
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for(i = x; i <= y; i++){
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int if_ss = 1;
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temp = i * i + i + 41;
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if(!(temp % 2)) if_ss = 0;
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else for(j = 2 ; j <= sqrt(temp); j++){
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if(!(temp % j)){
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if_ss = 0;
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break;
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}
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}
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if(!if_ss){
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printf("Sorry\n");
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if_ass = 0;
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break;
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}
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}
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if(if_ass) printf("OK\n");
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getchar();
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}
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return 0;
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}
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