function likes(names) {
 if(names.length === 0) {
   return 'no one likes this'
 } else if( names.length === 1) {
   return `${names[0]} likes this`;
 } else if (names.length === 2) {
   return `${names[0]} and ${names[1]} like this`;
 } else if (names.length === 3) {
   return `${names[0]}, ${names[1]} and ${names[2]} like this`;
 } else if (names.length >= 4) {
   return `${names[0]}, ${names[1]} and ${names.length - 2} others like this `;
 }
}