用123这三个数字组6个数字的组合，要全部的结果!求大神帮忙!谢谢了!

要有123这三个数字的组合:123,132,213,231,312,321(相当于对应6个不同字母a,b,c,d,e,f)

两两组合:总***有36个

组成6个数字:a_

:123123,

123132,123213,123231,123312,123321

b_:132123,132132,132213,132,231,132312,132321

c

_:213123,213132,213213,213231,213312,213321

d_:231123,231132,231213,231231,231312,231321

e_:312123,312132,312213,312231,312312,312321

f_:321123,321132,321213,321231,321312,321321