已知4个数字，对他们进行全排列组合成不同的数字。可填在百位、十位、个位的数字都是1、2、3、4。组成所有的排列后再去掉不满足条件的排列。 -4 figures known for their wide array into different figures. Can fill in the 100, 10, single-digit figures are 1,2,3,4. With all components and then remove the conditions are not satisfied with the arrangement.