program in c......

1)wrap such that the oupput should be az,by,cx,dw.........................
2)wrap such that the oup put should be 1+10,2+9,3+8..........5+6
3)print the numbers in pyramid shape.......
1
2 2
3 3 3
4 4 4 4

4) print in rectangular characters

y
z y z
r z y z r
z y z
y