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It's a two-step process. First you need to lift in $\ZZ/27\ZZ[y]$, then lift the coefficients in $\ZZ$:

fp.lift().change_ring(ZZ)

It's a two-step process. First you need to lift in $\ZZ/27\ZZ[y]$, $\mathbb{Z}/27\mathbb{Z}[y]$, then lift the coefficients in $\ZZ$:$\mathbb{Z}$:

fp.lift().change_ring(ZZ)

It's a two-step process. First you need to lift in $\mathbb{Z}/27\mathbb{Z}[y]$, then lift the coefficients in $\mathbb{Z}$:

fp.lift().change_ring(ZZ)

Q(fp.lift())