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#include <iostream>
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#include <string>
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using namespace std;
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int main()
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{
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string word;
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int zero=0;
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int abc[26]=
{};
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cin>>word;
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for (int i=0;i<word.size();i++)
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{
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++abc[word[i]-'a'];
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}
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int maxword=-1,minword=999999;
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for (int i=0;i<26;i++)
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{
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if (abc[i]>maxword) maxword=abc[i];
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}
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for (int i=0;i<26;i++)
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{
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if (abc[i]<minword&&abc[i]!=0) minword=abc[i];
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}
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int cha;
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cha=maxword-minword;
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if (cha==2||cha==3||cha==5||cha==7||cha==11||cha==13||cha==17||cha==19||cha==23||cha==29||cha==31||cha==37||cha==41||cha==43||cha==47||cha==53)
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{
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cout<<"Lucky Word"<<endl;
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cout<<cha<<endl;
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}
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else
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{
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cout<<"No Answer"<<endl;
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cout<<zero<<endl;
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}
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system ("pause");
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return 0;
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}
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