A, B, and C each have a certain amount of sugar. A asks for some sugar from B to double his own sugar, and B asks for some sugar from C to double his remaining sugar. C then takes some sugar from A to double the amount of sugar he has left. Now A has three times as many sugars as C, and B has twice as many sugars as C. If it is known that C has 30 sugars at the beginning, how many sugars did B initially have?
甲、乙、丙三人各有糖若干块，甲向乙要来一些糖，使自己的糖数增加1倍，乙从丙处要来一些糖，使自己剩下的糖数增加1倍，丙再从甲处取来一些糖，使自己剩下的糖数也增加1倍．现在甲的糖数是丙的3倍，乙的糖数是丙的2倍，如果已知开始时丙有30粒糖，那么乙最初有多少粒糖？
<result>55</result>