input: [Filename] 73263_636.pdf [Docket Caption] RE: INVESTIGATION AND SUSPENSION OF PROPOSED CHANGES IN TARIFF - COLORADO PUC NO. 5, MOUNTAIN STATES TELEPHONE AND TELEGRAPH COMPANY, 930-15TH STREET, DENVER, COLORADO, FILED PURSUANT TO THIS COMMISSION'S DECISION NO. 72921, DATED APRIL 28, 1969. [Decision Title] 
output: ZZZ