/* package whatever; // don't place package name! */
 
import java.util.*;import java.util.stream.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		new Ideone().a("Establishments");
	}
 
	void a(String a){a=a.replaceAll("\\p{Upper}","$0$0").toLowerCase();List<List<String>>b=b(a),c;b.removeIf(d->d.stream().anyMatch(e->e.matches(".*(.).*\\1.*")));b.removeIf(d->{for(String e:d)for(String f:d)if(e!=f&e.length()==f.length())return 1>0;return 1<0;});c=new ArrayList(b);for(List<String>d:b)for(List<String>e:b){if(d==e)continue;int f=0,g=0;List h=new ArrayList(),i=new ArrayList();for(String j:d)h.add(f+=j.length());for(String k:e)i.add(g+=k.length());if(i.containsAll(h))c.remove(d);else if(h.containsAll(i))c.remove(e);}b=c;int d=-1;for(List e:b)d=d<0?c(e):Math.min(c(e),d);System.out.println(d<0?"evil":d);}int c(List<String>a){List<Integer>b=a.stream().map(c->c.length()).collect(Collectors.toList()),d;int e=d(b.toArray(new Integer[0])),f=0,g=0,h;d=b.stream().map(A->e/A).collect(Collectors.toList());Map<Character,Integer>i=new HashMap(),j=new HashMap();for(;g<a.size();g++){h=d.get(g);String k=a.get(g);for(char l:k.toCharArray()){i.put(l,i.getOrDefault(l,0)+1);j.put(l,j.getOrDefault(l,0)+h);}}for(char k:i.keySet())f+=i.get(k)*j.get(k);return f;}int d(Integer...a){int b=a.length,c,d,e;if(b<2)return a[0];if(b>2)return d(a[b-1],d(Arrays.copyOf(a,b-1)));c=a[0];d=a[1];for(;d>0;d=c%d,c=e)e=d;return a[0]*a[1]/c;}List b(String a){List<List>b=new ArrayList(),c;for(int i=0;++i<a.length();b.addAll(c)){String d=a.substring(0,i),e=a.substring(i);c=b(e);for(List f:c)f.add(0,d);}b.add(new ArrayList(Arrays.asList(a)));return b;}
}

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