/* input{
    width:10px;
    height:10px;
    padding: 0px;
    margin: 0px;
  } */
 td{
    border: 1px solid black;
    margin: 0px;
    padding: 0px;
    text-align: center;
    font-size: 10px;
    font-weight: bold;
}
table{
    border-collapse: collapse;
}
body{
  padding:0px;
  margin:0px;
  border:0px;
}

#step,#prime{
 font-weight: bold; 
}