l=[1, 2, 6, 11, 12, 15, 18]
r=[[1, 2, 3, 4, 5, 6], [7, 8, 9, 10, 11, 12], [13, 14, 15, 16, 17, 18]]
for i in l:
for (j, lst) in enumerate(r):
if i in lst:
print (lst.index(i),j,i)
bD1bMSwgMiwgNiwgMTEsIDEyLCAxNSwgMThdCnI9W1sxLCAyLCAzLCA0LCA1LCA2XSwgWzcsIDgsIDksIDEwLCAxMSwgMTJdLCBbMTMsIDE0LCAxNSwgMTYsIDE3LCAxOF1dCgpmb3IgaSBpbiBsOgoJZm9yIChqLCBsc3QpIGluIGVudW1lcmF0ZShyKToKCQlpZiBpIGluIGxzdDoKCQkJcHJpbnQgKGxzdC5pbmRleChpKSxqLGkp