select which is different..342,511,126,215. Choose the correct choice from the following choices:
A) 342
B) 511
C) 126
D) 215
E) can't be calculated
7*7*7= 
<gadget id="calculator">7*7*7</gadget>
<output>343</output>
343,343-1=342   8*8*8= 
<gadget id="calculator">8*8*8</gadget>
<output>512</output>
512,512-1=511   5*5*5= 
<gadget id="calculator">5*5*5</gadget>
<output>125</output>
125,125+1=126   6*6*6= 
<gadget id="calculator">6*6*6</gadget>
<output>216</output>
216,216-1=215   answer 126
<result>C</result>
select which is different..342,511,126,215.