370   400   430   460   490   520   550   580   610   640   670
          385   415   445   475   505   535   565   595   625   655   685
 640       |     |     |     |     |     |     |     |     |     |     |
    655--- +bbbbb+GGGGGGGGGGG+LLLLLLLLLLLLLLLLL+OOOOO+QQQQQ+hhhhhhhhhhhh
 670       b     c           a                 f     r     g           h
    685--- b     c           +eeeeee           f     r     g           h
 700       b     c           J     e           f     r     g           h
    715--- +ccccc+           J     eeeeeee     f     r     g           h
 730       d                 J           e     f     r     g           h
    745--- +jjjjjj           JJJJJJJJJJJJ+fffff+     r     +SSSSSSSSSSS+
 760       i     j                                   r     o           m
    775--- +DDDDD+vvvvvv     kkkkkk+nnnnnnnnnnnn     r     o           m
 790       E     u     v     k     l           n     r     o           m
    805--- E     u     v     +IIIII+MMMMMM     n     r     o     pppppp+
 820       E     u     v     q           M     n     r     o     p     t
    835--- E     u     v     q           MMMMMM+     r     +pppppp     t
 850       E     u     v     q                 q     r     s           t
    865--- E     u     v     qqqqqqqqqqqqqqqqqqq     r     s           t
 880       E     u     v                             r     s           t
    895--- E     u     v     wwwwwwwwwwww+zzzzzz     +ssssss     BBBBBB+
 910       E     u     v     w           x     z     A           B     C
    925--- E     u     v     w           x     z     A           B     C
 940       E     u     v     w           x     z     A           B     C
    955--- EEEEEE+FFFFF+HHHHH+KKKKKKKKKKK+NNNNN+PPPPP+RRRRRRRRRRR+CCCCCC