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#include<stdio.h>
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int main()
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{
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int n,m,n1;
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while(scanf("%d",&n)!=EOF&&n!=-1)
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{
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m=n;
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n/=30;
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n=15-n;
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if(n>=12)
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n-=12;
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if(m%30==0)
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printf("Exactly %d o'clock\n",n);
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else
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{
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if(n==0)
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n1=11;
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else
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n1=n-1;
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printf("Between %d o'clock and %d o'clock\n",n1,n);
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}
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}
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return 0;
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}
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