Παλινδρομη κυηση

Question

&Gamma;&epsilon;&iota;ά &kappa;&alpha;&iota; &alpha;&pi;&omicron; &epsilon;&mu;έ&nu;&alpha;.&Mu;έ&sigma;&alpha; &sigma;&epsilon; 6 &mu;&eta;&nu;&epsilon;&sigmaf; &epsilon;&iota;&chi;&alpha; 2 &phi;&omicron;&rho;&epsilon;&sigmaf; &pi;&alpha;&lambda;ί&nu;&delta;&rho;&omicron;&mu;&eta; &kappa;ύ&eta;&sigma;&eta;.Έ&chi;&omega; &tau;&alpha; &alpha;&pi;&omicron;&tau;&epsilon;&lambda;έ&sigma;&mu;&alpha;&tau;&alpha; &alpha;&pi;&omicron; &tau;&eta;&nu; &pi;&rho;ώ&tau;&eta; &iota;&sigma;&tau;&omicron;&lambda;&omicron;&gamma;&iota;&kappa;ή &epsilon;&xi;έ&tau;&alpha;&sigma;&eta; &kappa;&alpha;&iota; &theta;&alpha; ή&theta;&epsilon;&lambda;&alpha; &tau;&eta; &gamma;&nu;&omega;&mu;&eta; &sigma;&alpha;&sigmaf; .  -&Pi;&alpha;&lambda;&iota;&nu;&delta;&rho;&omicron;&mu;&omicron;&sigmaf; &epsilon;&nu;&delta;&omicron;&mu;ή&tau;&rho;&iota;&alpha; &kappa;ύ&eta;&sigma;&eta; 1&omicron;&upsilon; &tau;&rho;&iota;&mu;ή&nu;&omicron;&upsilon; &pi;&rho;&omega;&iota;&mu;ό&tau;&epsilon;&rho;&omicron;&upsilon; &alpha;&nu;&alpha;&pi;&tau;&upsilon;&eta;&iota;&alpha;&kappa;&omicron;&upsilon; &sigma;&tau;&alpha;&delta;ί&omicron;&upsilon; &mu;&epsilon; &epsilon;&pi;&iota;&mu;έ&rho;&omicron;&upsilon;&sigmaf; &mu;&omicron;&rho;&phi;&omicron;&lambda;&omicron;&gamma;&iota;&kappa;ά &chi;&alpha;&rho;&alpha;&kappa;&tau;&eta;&rho;&iota;&sigma;&tau;&iota;&kappa;ά &epsilon;&nu;&delta;&epsilon;&iota;&kappa;&tau;&iota;&kappa;ά &chi;&rho;&omega;&mu;&alpha;&tau;&iota;&kappa;ώ&nu; &alpha;&iota;&tau;&iota;ώ&nu;.  -&Tau;&alpha; &lambda;&omicron;&iota;&pi;ά &epsilon;&upsilon;&rho;ή&mu;&alpha;&tau;&alpha;(&lambda;&epsilon;&mu;&phi;&omicron;&mu;&omicron;&nu;&omicron;&pi;&upsilon;&rho;&eta;&nu;&iota;&kappa;έ&sigmaf; &delta;&iota;&eta;&theta;ή&sigma;&epsilon;&iota;&sigmaf; &kappa;&alpha;&iota; &theta;&rho;&omicron;&mu;&beta;ώ&sigma;&epsilon;&iota;&sigmaf;) &kappa;&alpha;&theta;&iota;&sigma;&tau;&omicron;ύ&nu; &sigma;&kappa;ό&pi;&iota;&mu;&omicron; &tau;&omicron;&nu; &sigma;&chi;&epsilon;&tau;&iota;&kappa;ό &epsilon;&rho;&gamma;&alpha;&sigma;&tau;&eta;&rho;&iota;&alpha;&kappa;ό έ&lambda;&epsilon;&gamma;&chi;&omicron;.  &Epsilon;&pi;&iota;&sigma;&eta;&sigmaf; &theta;έ&lambda;&omega; &nu;&alpha; &rho;&omega;&tau;ή&sigma;&omega; &tau;&iota; &pi;&rho;έ&pi;&epsilon;&iota; &nu;&alpha; &kappa;&alpha;&nu;&omega; &alpha;&pi;&omicron; &delta;&omega; &kappa;&alpha;&iota; &sigma;&tau;&omicron; &epsilon;&xi;ή&sigmaf; &kappa;&alpha;&iota; &mu;&epsilon;&tau;&alpha; &alpha;&pi;&omicron; &alpha;&upsilon;&tau;&alpha; &tau;&alpha; &sigma;&upsilon;&mu;&pi;&epsilon;&rho;ά&sigma;&mu;&alpha;&tau;&alpha; &delta;&epsilon;&nu; &theta;&alpha; έ&pi;&rho;&epsilon;&pi;&epsilon; &omicron; &gamma;&iota;&alpha;&tau;&rho;ό&sigmaf; &nu;&alpha; &mu;&omicron;&upsilon; &pi;&epsilon;&iota; &pi;&rho;&iota;&nu; &pi;&rho;&omicron;&sigma;&pi;&alpha;&theta;ή&sigma;&omega; 2 &phi;&omicron;&rho;&alpha; &nu;&alpha; &kappa;&alpha;&nu;&omega; &tau;&eta;&nu; &epsilon;&xi;έ&tau;&alpha;&sigma;&eta; &mu;&omicron;&rho;&iota;&alpha;&kappa;ό&sigmaf; έ&lambda;&epsilon;&gamma;&chi;&omicron;&sigmaf; &theta;&rho;&omicron;&mu;&beta;&omicron;&phi;&lambda;ί&alpha;&sigmaf; ; &Epsilon;&upsilon;&chi;&alpha;&rho;&iota;&sigma;&tau;ώ