To open the chest of shells the souvenir merchant must enter a code. As his memory is poor, to remember the code he has filled in this speech bubble so that every statement is correct. What is the code?

? X number 1,
? X number 2,
? X number 3,
? X number 4.

The multipliers are the numbers 1,2,3,4,5, or 6.

The hints are,

None of the numbers of the code is greater than 4.
Number 4 ony features once.
The numbers 1 and 3 are present twice.