Need solution explain each step thanks

The following ciphertext is achieved by encrypting the plaintext with a row transposition cipher. The key used to encrypt the plaintext and the ciphertext is given here, your task is to recover the plaintext by performing decryption of the ciphertext. Key = 3 1 5 6 2 4 7 Ciphertext UCTASAOOAIIRNOSARLTBOUMAUCIOFIVTNEOUOUECLTHTSLSNRSTOEIUP OISAFAIDFOTSSD