The bottom panel of Fig. shows the analysis of the spectrum in terms of the contributions from different hydrogen-bonding patterns around the first solvation shell. The motifs shown in the figure add up to 68.9% of the structures sampled in by the simulation. The 6D6A motif, which corresponds to the DDAA motif of the central water, has the highest contribution. Due to many different motifs of hydrogen bonding around the first shell, the overall effect is that these structures cannot be mapped into particular spectral features but rather they collectively contribute to the inhomogeneous broadening and smoothening of the spectrum.