aa#bb|aahhh acccb|abbgg dddff|cb#fg eeefg|cdffe hhhgg|cddee -----+----- dddee|aabbb cccfe|a#hhh bbbff|cdefg aaggg|cdefg #ahhh|cdefg -----+----- bbbaa|ggfff ghhha|geeaa ggecc|dde#a fee#c|hdbbb ffddd|hhccc