integer alphabet pair to matrix

z=list(input().strip().split())

R,C=map(int,input().split())

s=[]

for d in z:

    i=d[:-1]

    j=d[-1]

    for k in range(int(i)):

        s.append(j)

k=0

for i in range(R):

    for j in range(C):

        print(s[k],end=' ')

        k+=1

    print()