def is_prime(a):
    x = True 
    for i in range(2, a):
       if a%i == 0:
           x = False
           break
    if a<2:
        x = False 
    return x

def ReadMAtrix(R,C):
    matrix = []
    print("Enter the entries rowwise:")

    for i in range(R):
        a = []
        for j in range(C):
            a.append(int(input()))
        matrix.append(a)
    return matrix

R = int(input("Enter the number of rows:"))
C = int(input("Enter the number of columns:"))
Mat=[]
Mat=ReadMAtrix(R,C)
print('prime in matrix : ')
for i in range(R):
    for j in range(C):
        if is_prime(Mat[i][j]) :
            print(Mat[i][j], end=" ")