table.fourwords {border-collapse: collapse; border: 1px solid black; margin-top: 1em; margin-bottom: 1em; font-family: sans-serif}
table.fourwords th {border-right: 1px solid black; border-top: 1px solid black; text-align: right}
table.fourwords th img {vertical-align: bottom; border: 0}
table.fourwords td.empty {border-left: 1px solid black}
table.fourwords td.answer {border: 1px solid black}
table.fourwords input {font-family: sans-serif; font-size: 14pt; width: 1.25em; border: 0; text-align: center}