Known four natural numbers, A, B, C, D satisfy A<B<C<D, and the order of their two-by-two sums from small to large is: 23, 26, 29, 93, X, Y. Then X+Y=how much.
已知四个自然数，A，B，C，D满足A＜B＜C＜D，他们两两的和从小到大的次序为：23，26，29，93，X，Y．则X+Y=多少．
<gadget id="calculator">13 + 83</gadget>
<output>96</output>

<gadget id="calculator">16 + 83</gadget>
<output>99</output>

<gadget id="calculator">96 + 99</gadget>
<output>195</output>

<result>195</result>