Step One 1
Step Two 11
Step Three 23
Step Four 33
Step Five 43
Step Six 55
Step Seven 67
Step Eight 79
Step Nine 89
Step Ten 101
Step Eleven 111
Step Twelve 123
Step Thirteen 135
Step Fourteen 147
Step Fifteen 159
Step Sixteen 169
Step Seventeen 181
Step Eighteen 193
参考答案 205