Python offline crypto generator (aka cold wallet)

Create offline script which generates *cold address from randomly generated seed phrase. *Cold address means address created in offline mode (w/o internet connection or any other online stuff).

For example: 'nestles clefts clefts eagerly squired squired seaward anyplace anyway piked soggiest soggy' generates 'APL-SJRR-8UT4-MLK5-DBUHW'
Final output format: phrase:address in console.