//定义变量abcdef来代表abcdef六个队员
 var a, b, c, d, e, f;
//for循环遍历每个人都可能去的情况
    for (a = 0; a < 2; a++) {
        for (b = 0; b < 2; b++) {
            for (c = 0; c < 2; c++) {
                for (d = 0; d < 2; d++) {
                    for (e = 0; e < 2; e++) {
                        for (f = 0; f < 2; f++) {
                              //限制条件
                            if ((a + b >= 1) && (a + d < 2) && (a + e + f == 2) && (b + c == 2 || b + c == 0) && (c + d == 1) && ((d==1&&e==0) || (d ==0 &&e == 0)||(d==1&&e==1))) {
                                //去的队员对应变量为1
                                console.log(a, b, c, d, e, f);
                                var str = "";
                                //1为true 就在str中添加对应的该队员
                                if(a){
                                    str+="a";
                                }
                                if(b){
                                    str+="b";
                                }
                                if(c){
                                    str+="c";
                                }
                                if(d){
                                    str+="d";
                                }
                                if(e){
                                    str+="e";
                                }
                                if(f){
                                    str+="f";
                                }
                                 //str即去的人员
                                console.log(str);
                            }
                        }
                    }
                }
            }
        }
    }