# Specific set number generator

#### eyej

##### New Member
Hi,

Im totally newbie in statistic and i would like to ask for help. I need to write a program for generating a list of numbers from a specific set and with some rules. For example, the allowed set is {1,2,4,5}.
Rules are: generated numbers must be 7 digits long, number 2 can be included exactly 2 times. Number 5 can be included exactly 3 times. Example of the result could be:

5551224
5515224
5512524
5512254
5512245
2555214
...

That means in every generated number, i need to have two numbers of 2, three numbers of 5, one 1 and one 4, in every combination.

Could someone help me with algorithm please or at least tell me what is a name of my problem so i could google it ?

Thanks a lot!

#### beemzet

##### New Member
Hi,

Im totally newbie in statistic and i would like to ask for help. I need to write a program for generating a list of numbers from a specific set and with some rules. For example, the allowed set is {1,2,4,5}.
Rules are: generated numbers must be 7 digits long, number 2 can be included exactly 2 times. Number 5 can be included exactly 3 times. Example of the result could be:

5551224
5515224
5512524
5512254
5512245
2555214
...

That means in every generated number, i need to have two numbers of 2, three numbers of 5, one 1 and one 4, in every combination.

Could someone help me with algorithm please or at least tell me what is a name of my problem so i could google it ?

Thanks a lot!
search for "generating a combination list"