Input codes | Multiradical | Handwritten | Four-corner | Kana input |

Radicals | Multiradical by type | Handwritten (old) | SKIP | Options |

The four-corner system is a system for encoding kanji into numbers
using the shapes of the four corners of the character. The corners are
taken from top to bottom and left to right. The four-corner code for
口 is **6000**, where the 6 means "square shape at top left", and
the three 0s indicate that the square shape was previously used. The
four-corner code for **品** is **6066**, indicating a square at
the top left, with the same square also constituting the right corner,
followed by two more squares indicated by 66 at the bottom left and
right.

A horizontal line is indicated by a 1, and a corner by 7,
so **1771** is the four-corner code for 乙, which has corners at
the top right and bottom left, and horizontal lines at the other two
corners. A vertical line is indicated by a 2, so 川 is **2200**,
where the twos indicate vertical lines and the 0s indicate that the
vertical lines were previously used at the top.

A line which crosses another line is indicated by **4**, so 力
is **4002** indicating the crossed line, used again twice, and then
by 2 for the vertical line at the bottom right. A line which crosses
two other lines is indicated by **5**, so 丈 is **5000** for the
downward line crossing two others.

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