A telephone number has the form $ABCDE$-$FGHIJ$, where each letter represents a different digit. The digits in each part of the number are in decreasing order; that is, $A>B>C>D>E$ and $F>G>H>I>J$. Furthermore, $F,G,H,I,$ and $J$ are consecutive digits. $A+B+C+D+E=20$. Find $A$.