Fig. 8

a, b: Two different realizations of letter “π” also appearing in “FYSAP”: the one in sub-figure a is considered to be the prototype-fixed letter, while the realization in b is the current one; c Optimal fitting of these two realizations, according to the analysis introduced in the present sub-Sect. 3.2. Once more, the intersection of the bodies of the two letters is shown in black, while their union is depicted in degradations of grey; again, the contours of the alphabet symbols are shown colored