p.solid {border-style: solid text-align: center;}
div.a {
  text-align: center;
}

 /* Three image containers (use 25% for four, and 50% for two, etc) */
.column {
  float: left;
  width: 10px
  padding: 1px;
}

/* Clear floats after image containers */
.row::after {
  content: "";
  clear: both;
  display: table;
}