my @entities = ('quot','amp','apos','lt','gt','nbsp','iexcl','cent','pound','curren','yen','brvbar','sect','uml','copy','ordf','laquo','not','shy','reg','macr','deg','plusmn','sup2','sup3','acute','micro','para','middot','cedil','sup1','ordm','raquo','frac14','frac12','frac34','iquest','Agrave','Aacute','Acirc','Atilde','Auml','Aring','AElig','Ccedil','Egrave','Eacute','Ecirc','Euml','Igrave','Iacute','Icirc','Iuml','ETH','Ntilde','Ograve','Oacute','Ocirc','Otilde','Ouml','times','Oslash','Ugrave','Uacute','Ucirc','Uuml','Yacute','THORN','szlig','agrave','aacute','acirc','atilde','auml','aring','aelig','ccedil','egrave','eacute','ecirc','euml','igrave','iacute','icirc','iuml','eth','ntilde','ograve','oacute','ocirc','otilde','ouml','divide','oslash','ugrave','uacute','ucirc','uuml','yacute','thorn','yuml','OElig','oelig','Scaron','scaron','Yuml','fnof','circ','tilde','Alpha','Beta','Gamma','Delta','Epsilon','Zeta','Eta','Theta','Iota','Kappa','Lambda','Mu','Nu','Xi','Omicron','Pi','Rho','Sigma','Tau','Upsilon','Phi','Chi','Psi','Omega','alpha','beta','gamma','delta','epsilon','zeta','eta','theta','iota','kappa','lambda','mu','nu','xi','omicron','pi','rho','sigmaf','sigma','tau','upsilon','phi','chi','psi','omega','thetasym','upsih','piv','ensp','emsp','thinsp','zwnj','zwj','lrm','rlm','ndash','mdash','lsquo','rsquo','sbquo','ldquo','rdquo','bdquo','dagger','Dagger','bull','hellip','permil','prime','Prime','lsaquo','rsaquo','oline','frasl','euro','image','weierp','real','trade','alefsym','larr','uarr','rarr','darr','harr','crarr','lArr','uArr','rArr','dArr','hArr','forall','part','exist','empty','nabla','isin','notin','ni','prod','sum','minus','lowast','radic','prop','infin','ang','and','or','cap','cup','int','there4','sim','cong','asymp','ne','equiv','le','ge','sub','sup','nsub','sube','supe','oplus','otimes','perp','sdot','lceil','rceil','lfloor','rfloor','lang','rang','loz','spades','clubs','hearts','diams');

$longest = 0;
for(@entities){
	$longest = length($_) if(length($_) > $longest);
}
print $longest;