Which of the following molecules are linear?

BF3
HN3
COS
NH3
O3
SiF4
AsH3
SO2
C2H2
PF3
CF4
H2O
SO3
HCN
N2O
H2S
CS2

After drawing out all the lewis structures, and using VSPER theory, I found: COS, C2H2, CS2, HCN to be linear.
Am I right/missing any?

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