first, 4 - 4
$ U$ U" h: y3 f/ W公仔箱論壇if one side more heavy, take up and check next. if equal, then the uncheck 4 take to check next.
0 z% ^9 u: N5 Jsecond, 2 - 2
4 I$ E/ n, p8 o7 ctake the different 4 spread to 2 - 2 and check it. more heavy side take up to the next step.0 {8 v: B: [: w
third, 1 - 1' T+ C; i$ s: h$ v7 Q
bingo!! |