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A company and its partner are collaborating on a research project, each with multiple VPCs in the us-east-1 Region. The company's VPCs use CIDR blocks within 10.10.0.0/16 and are connected via a transit gateway named TGW-C (ASN 64520). The partner's VPCs use CIDR blocks within 172.16.0.0/16 and are connected via a transit gateway named TGW-P (ASN 64530).
What solution will enable network connectivity between the company's and partner's VPCs in us-east-1 with the MINIMUM changes to both networks?